A strange thing happened

I'm relearning chess and, in order to learn how to beat the Chess.com character 'Nelson' (ELO 1300), I ran the entire game using 'Hints' to make all the moves (to see what the computer would do against him). I used Hints from the first two moves of the Queen's Gambit onwards and the Hints moves beat Nelson easily. But, when the Analysis came up at the end of the game, it showed that Hints had made 2 Mistakes! I assumed that Stockfish 15 is used for both Hints and the Analysis; if so, how come the Analysis Stockfish 15 thinks that the same program made 2 mistakes with generating its Hints? I can understand that Stockfish 15 might have a couple of options in mind at any stage of the game but I wouldn't have thought such differences would be called Mistakes. Just curious.

The evaluation of moves often depends on the depth of the search.

I would guess that the analysis depth is deeper than the hint depth.

Thanks. I'm not sure why that would be, but I guess you're right.