did i just lose a .2btc transaction because the fee was set at .2btc?
Aww man, I'm so sorry reading that!! Things can be confusing in advanced settings, yeah... Better just stick to the regular send-feature! I once almost screwed up with those long Bitcoin addresses. Mixed up a few numbers or letters. It was already pretty late and I was out partying!
FYI: Bitcoin addresses have a built in "checksum" so if you type any digit incorrectly it will not be accepted as a valid Bitcoin address. You would have to change and swap the letters and digits in a very non trivial way in order to accidently create another valid address - for all practical purposes it is impossible. If you do manage to be lucky enough to mistype an address in such a way as to create a different
valid address then you are so lucky you should be playing the lotto every chance you get.