You had several queen cells. The piping is more than one queen, they are talking to each other to locate and fight. The hive should be ok if they have plenty of stores. You should have a laying queen in 5 to 10 days.
I went back and looked at your other post. You may have had a swarm or more from that hive. Not much you can do now excpt give them time to finish their thing. You should end up with a mated queen.
I am waiting on mine to cap all brood, "which should be Tuesday" to see if they made any queen cells. If not I will have to get another queen. Mine was a 5 frame nuc and they balled the queen the next day after I got it home. That was last Sunday.