Why is Sift Heads World being stupid?

I made an account because when i finished the series i found out you can make an account so i did. everything was going fine till i reached world act 3. if you have an account you shouldn't have to pick a first weapon but it still tells me to. When i do pick a weapon the bullet doesn't even affect the villain. Its getting annoying cause its the same for everyone except worlds act 1 and 2? I need some help. cause i want to finish the game, ( even though i did already ) Also this problem made me loose my Thompson Machine Gun. I LOVED THAT GUN!! so yeah a little help would be nice. Oh my goodness i sound like a nerd.