Just a suggestion:
When importing decks, if you have the required number of copies of a specific card from one set, as well as not enough copies from a newer set, the imported deck will split the copies between the two printings even though you have enough from the earlier one.
Examples (sorry I don't have screenshots):
I have 4 Fabled Passage from Throne of Eldraine and 1 from M21. When importing a Historic deck with 3 Fabled Passage, it added a 2/1 split of ELD/M21 copies when it would make more sense to add 3 from Eldraine.
I have 4 Duress from the Mystical Archive and 1 from Midnight Hunt. I imported a deck with 2 Duress and it split those between STA/MID printings.
My suggestion would be to have the import deck feature check to see if you have enough of any one printing before splitting between printings.