Backspace issues

[buffaloquinn]

I'm having a problem with the backspace key deleting back like it should but also deleting forward. So everytime I use it I'm getting a double delete. This makes it almost impossible to correct mistakes. Same thing happens most of the time when I select an alternate suggested word. It deleted and replaced the word and deletes the equivalent number of letters forward as well.
BTW, this seems to be a common issue with other FB alternates I've tried too.