Else statement executing when it shouldnt

[eli m]

an else statement is running when it shouldnt be. It is on the last line. Whenever i am in the math or game function, when i type in main, it goes back to the start of the program, but it also says not a valid function. I am stumped!
Here is my code:
#Cmd 
#Created By Eli M.
#import modules
import random
import math
gtn = 0
print ("Type in help for a list of cmd functions")
#initiate main loop
cmd = 0
while cmd == 0:
#ask for input on function
    function = raw_input("Type in a function:")
    #start math loop
    if function == "math":
        run = 0
        while run == 0:
            #ask for math operation
            type = raw_input("What math operation do you want to use?")
            if type == "multiplication":
                x = raw_input("Type in your first number:")
                y = raw_input("Multiply your first number by:")
                try:
                    ans = int(x) * int(y)
                    print (ans)
                    try:
                        ans = float(x) * float(y)
                        print (ans)
                    except ValueError, err:
                        print ("Not a valid number")
                except OverflowError, err:
                    print ("Number too large")
            #division math function
            if type == "division":
                x = raw_input("Type in your first number:")
                y = raw_input("Divide your first number by:")
                try:
                    ans = float(x) / float(y)
                    print (ans)
                except ZeroDivisionError, err:
                    print ("Can't divide by zero")
                except ValueError, err:
                    print ("Not a valid number")
                except OverflowError, err:
                    print ("Number too large")
                    #subtraction math function
            if type == "subtraction":
                x = raw_input("Type in your first number:")
                y = raw_input("Subtract your first number by:")
                try:
                    ans = float(x) - float(y)
                    print (ans)
                except ValueError, err:
                    print ("Not a valid number")
            #addition math function
            if type == "addition":
                x = raw_input("Type in your first number:")
                y = raw_input("Add your first number by:")
                try:
                    ans = float(x) + float(y)
                    print (ans)
                except ValueError, err:
                    try:
                        ans = int(x) + int(y)
                        print (ans)
                    except ValueError, err:
                        print ("Not a valid number")
                except OverflowError, err:
                    print ("Number too large")
            #square root math function
            if type == "square root":
                x = raw_input("Type in your number:")
                try:
                    y = float(x)
                    z = math.sqrt(y)
                    print (z)
                except ValueError, err:
                    print ("Not a valid number")
                except OverflowError, err:
                    print ("Number too large")
            
            #to the power of... math function
            if type == "power":
                    x = raw_input("Type in your number:")
                    y = raw_input("Multiply your first number by the power of:")
                    try:
                        ans = float(x) ** float(y)
                        print (ans)
                    except OverflowError, err:
                        print ("Number too large")
                    except ValueError, err:
                        print ("Not a valid number")
            #break the math loop
            if type == "main":
                run = 1
            #absolute value math function
            if type == "absolute value":
                try:
                    x = float(raw_input("Type in your number:"))
                    y = math.fabs(x)
                    print (y)
                except ValueError, err:
                    print ("Not a valid number")
    if function == "random number":
        try:
            x = int(raw_input("Minimum number:"))
            y = int(raw_input("Maximum number:"))
            num = random.randint(x, y)
            print (num)
        except ValueError, err:
            print ("Not a valid number")
    if function == "games":
        games = 0
        while games == 0:
            gamechoice = raw_input("What game do you want to play:")
            if gamechoice == "guess the number":
                run = 0
                while run == 0:
                    print ("I am thinking of a number between 1 and 20")
                    num = random.randint(1, 20)
                    num = int(num)
                    guesses = 0
                    guessestaken = 0
                    while guesses == 0:
                        try:
                            guess = raw_input("Your guess:")
                            guess = int(guess)
                            guessestaken = (guessestaken) + 1
                            guessestaken = int(guessestaken)
                            if guess == (num):
                                print 'Correct! It took you', int(guessestaken), 'guesses!'
                                playagain = raw_input("Do you want to play again?")
                                if playagain == "yes":
                                    guesses = 1
                                if playagain == "no":
                                    run = 1
                                    guesses = 1
                            if guess > num:
                                print ("My number is lower")
                            if guess < num:
                                print ("My number is higher")
                        except TypeError, err:
                            print ("Not a valid number")
            if gamechoice == "main":
                games = 1
            
    #help function
    if function == "help":
        helpfunc = 0
        while helpfunc == 0:
            #show functions
            print ("Functions:")
            print ("Math: multiplication, division, subtraction, addition, square root, power, absolute value")
            print ("Random Number")
            print ("Games: Guess the number")
            helpmain = raw_input("Type in main to go back")
            if helpmain == "main":
                #end helpfunction loop
                helpfunc = 1
                cmd = 0     
	else:
		print ("Not a valid function")