finger slip on live games

just played 2 live games and lost both due to piece not ending up on the position I chose. I am using a samsung tab 2. its issues like this that keep me from switching my subscription from playchess.com to here sadly

2 suggestions: 1) get a mouse 2) Yahoo and POGO chess both have 'request undo' buttons for friendly games, but that does not ensure your opponent will allow you to undo your misplaced move. I have rarely seen anyone allow an undo in a rated game, mis-mousing is part of the game.

This is maddening. Why not a 'confirm move' button or something?

This happens to me a lot. Even worse is when you touch the top corner square and hit reverse white and black by mistake. Then a pop up prevents you from undoing it.