Just a heads-up on the kind reply of the guys from chess.com
First of all they removed the sandbagging flag. A closer look at my games revealed that I'm not intentionally losing games. So, issue solved.
Furthermore, they said that they are tweaking the parameters of their system to be better able to finetune who does and who don't need to be flagged. I trust this is a complicated and delicate proces, but at least they do what they can to make it as good a place to play chess as they can. And that's what does matter IMHO.
So, chess.com team: a big thanks and CU @ the chessboard!
Kind regards
It's also good to look at how many blunders you made if you lose.