Yeah that too. I don't know man, i'm not gonna say that i dont like tri as a whole, but some things don't feel right. Here is the list of things that are bothering me (things that i can remember right now, probably there are many more lol):
1 - first things first, the 02 kids.I'm gonna say it again, i'm completely fine if they just killed them (not likely because of adv 02's ending when we see the future), but if tri is only about the adv 01 kids, then they didn't have to mention the 02 kids. they start off the first movie with them being defeated, they show us a version of ken, imperialdramon just appears out of nowhere under the control of the fake digimon kaiser, they show a tv screen where we can see that the 02 kids are missing, tk and hikari's digivices are the same 02 generation, himekawa ends up at the dark sea... if they acknowledged the 02 then they HAVE to say what the hell happened to them. i think taichi and daigo will end up where they are, but who knows.
2 - alphamon is a scumbag that just appears out of the fucking nowhere and doesn't even bother saying a word to anyone. what the hell, doesn't matter why he is there, it would make some sense if this douche said something like 'hey bastards, i came here to end meicoomon and i don't care about anything else' when he first appeared, but nope, he just attacks everyone and doesn't give a shit about communicating.
3 - the thing you said about the mons remembering stuff they shouldn't bcause of the reboot.
4 - meiko whining all the time and agumon talking about food like it's do or die.
5 - we see himekawa carrying a rifle when she gets to the dark see, suddenly on the next scene it's not a rifle anymore, it's a handgun lol
6 - in the fight between the 4 mons jesmon is the only one that seems to think 'fuck this i'm gonna stop punching those pricks' and finally has the brilliant idea of using a skill power just to get kicked by alphamon and missing the attack.