They're just cups guys! Bees build them all the time. At times you'll have a bunch of them. They're not supersedure cells or swarm cells unless they have a larva inside, which they usually do not have. Tear them off and the bees build them back. BTW, supersedure cells are not necessarily along the top of the frame. They can be anywhere that the bees find a suitable larva of the right age to make a new queen.
Sounds like your package is trying to supercede your queen. They must know something about her that you don't. I've got an overwintered nuc that I put a newly purchased queen in about 6 weeks ago. I found a capped supercedure cell in there 2 days ago. I left it in there and I'm letting them work it out. I've found removing active Queen cells is treating the symptom not the problem.
I've found that when she fails (she invariably will) I don't have the replacement queen the hive was trying to make if I keep removing the active queen cells. The I end up scrambling for a replacement queen or combining them with another hive.
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