Board Thread:Current Major Glitch Discussion/@comment-30117738-20170124004208/@comment-85.179.204.177-20170124053941

Until a couple of months ago it was possible to combine a collection after the 4th item if the 5th was already in your inventory and the game considered the quest completed. Now you have to actually find the 5th item to finish the quest. It also works if the 5th item happens to drop or is gifted, but only if the quest for it is up at that moment. So even if the game tells you to combine a collection, don't do it until you gathered all of the required items in the right order of the quest. The good news is that you don't have to find the first four items again. If you find the 5th item of the prematurely combined collection the game still gives you credit for the combining part and the quest is fulfilled. Unless they also changed that in the meantime. I haven't dared to try it out.

I had to learn that the hard way, too and I find it a little frustrating to be honest. I think there are even one or two threads on this topic somewhere. (On the quest thing, not my frustration, of course 😊)

Oh, and just in case I misunderstood your post and my reply is totally unrelated: Please don't hate me, I meant well. 🙃