5:26 turn shouldn't have passed, Exveemon and the tamers both give +1 memory, so the player would have gone from -2 -> 0. 21:55 Leviamon X deletes level 3, 5 and 7, not level 4 which examon is, so shouldn't have been deleted. 25:12 forgot to gain memory from exveemon again, should be at -1, not -2.
Concerning the first timestamp, there was a Gazimon on the field that prevents memory gain except by tamer effects. This is also the case for the third timestamp.