Possible to block someone by mistake on iPhone Facebook app?

I was chatting to a girl on Facebook the other Damon the Facebook for iPhone app when suddenly as I sent a message the person disappeared and the name became "Facebook user" and it was as if she deleted me.

However I text her to ask If she deleted me she said no and so I checked in my settings and blocked people and she was in there and I had to unblock her.

Now I didn't confirm any block message and didn't do anything but type a message then she disappeared!

Is there anyway I could have accidentally pressed something in the iPhone app that could have blocked her? Or was I hacked on a pc?

Sometimes on any iphone app, it is easy to do things by accident. Big fingers, little screen -- it happens. Unblock your friend and move on…