Undo's should be allowed only during the bidding process. This mimics the silent bid of pulling a card out of the box and declaring mechanical mistake, replacing the bidding cards, and the pulling our the correct bid. Say you pulled a 2 of clubs and meant to pull the 3 of clubs. One just states the mechanical mistake, puts the 2 of clubs back into the bidding box and then pulls out the 3 of clubs. No foul was committed. I suggest that the software be changed that once the bidding is over there are no more UNDO'S for that hand. This is because in live bridge if a card is drawn from a hand and is seen by any player, the card must be immediately played or it sits on the table and is played whenever the first opportunity occurs.
