Pretty sure those 2 aren't the same people...

They are not,and this is correct person.I'm back-up researcher for our db.

What about the other Filip Djurovic from Napredak? Is he still in the database?

Other Filip Djurovic is not in db.There was this one from Radnicki 1923 who was transfered to Cukaricki,and now playin' for Sumadija.After Radnicki we didn't know where he is,so we put him in Napredak by mistake,because of the same name.

My concern is that this Filip Djurovic who I originally cut (the one from Napredak, born in 96) is apparently still around. He's just been loaned out by Napredak.
This Filip Djurovic from Sumadija is a different person (born in 99) and thus should be a different/new ID anyways, no?
Here's a more recent, improved cut for the Filip Djurovic from Napredak:

@Tatavo and @BajaHater

Can you both tell me which of these images has what UID?

As part of Serbian official research team,I'll upload correct guy with correct UID,other one is not in db,so you can save him in no-id folder.

That's great; thanks