I Think your fine. I like to think Superceding is a good thing. If they think they need a new queen, they probably are right.
The chances that your hive will swarm your first year will swarm is around 15%. However, the first year I had my hive, of course my chances fell in that 15%. Now I have to make another split within a couple of weeks after I just made another split about a 2 weeks ago. Probably another split after that. Then i'll leave them build up for the winter. Gah! Three more hives added to my beeyard from one. I shouldn't have lent them all of their honey last year... Anyways, I will probably do it again, and triple of quadruple all of my hives again the next year. Then i'll have... ehhh... 16 hives in 2 years from just 1 hive to begin with. NOT counting the rest of the hives I have. I'm going to have to open up a loan...
Anyways, I wouldn't crush those queen cells, its most likely supercedure. You might end up with a queenless hive if you crush them.
As Micheal Bush once had in is signature: "All things work if you let them"
I Love to Ramble, as you can probably see.
Jake