Pawn problem

You've stumbled into a rule called En Passant. It's common that people don't know about this rule, but it has been around about as long as the two-square pawn move.

You can read about this here: http://www.chess.com/chessopedia/view/en-passant
"After pawns were granted the ability to move two squares on their first move, the En passant rule was introduced in 1490 to prevent pawns from having too much power or freedom."
Have any of you had games where you have selected to move a pawn two places but its only been recorded as one place. Then disaster your opponent takes your piece?
Can I report this to chess.com somewhere?