@FerGue52 that's exactly why I don't like the system. It was my only good rating and now it's gone. It's going to take so much studying and practice for me to get it back up to 2076!
It was your only positive assessment because it was incorrect. It's impossible that with your 500 level of play you could have reached 2000. It's very strange. However, nothing prevents you from starting the climb again by solving problems you don't see in games. I hope without external help from programs, because that way you won't learn and you'll remain at 500 in reality.
Why does it matter that there is a difference in puzzle rating and normal chess rating?