puzzles trainer is way off

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siempresisyphus

First puzzle I did was 426 rating.  Second was 1846.  Third was 500.  Fourth was 2030.  What's going on? I've cleared the trainer for now.  The percentage failure will be high if I continue, and keeping that low is my goal as I improve. 

What's going on? I contacted chess.com and supposedly my question was sent to a developer.  That was a long time ago.