Sandra Carter


The site allows all legal moves. But based on the rest of your post, it sounds like you were impacted by lag and/or disconnects.
https://support.chess.com/article/213-how-do-i-fix-my-disconnect-lag-issues
https://support.chess.com/article/873-how-can-i-improve-my-live-chess-connection
Also, opening tickets to support is how you contact staff.
https://support.chess.com/article/346-contact-us