It helps so much having people read and comment. It helps with missing oversights like that. It's a little embarrassing at first, but it helps in the long run. Believe it or not, but Pain (my newest short story) was the first piece of writing where I was careful to look back and edit things. I'm not talking about proofreading, but actually changing words around and editing the story to my liking. Everything else I did in one shot. Not the best tactic, but I'm getting over it.
I totally get how you feel. Well, FF&W isn't all that busy, but you definitely have to be in a special mood to write. I have the hardest time going back to edit things. I just finished it, why do I have to go back? XD