glad to be of help.
and i must say, i admire your eyesight or your ability to spot the queen.
young virgin queens are really hard to spot. they're fast and look almost just like worker bees (at least the two i spotted so far did).
i highly doubt she's already laying, or should i say it's close to impossible. 16 days from egg to queen and around 25 days from egg to laying queen-depending on weather.
now, you say you saw a few opened QC's, were they opened by side/chewed or were they opened at the bottom. if they were at the bottom, you could have more than 1 queen inside resultion in another swarm. if you didn't pay real good attention to how cells were opened, just pay a bit more attention on this hive behaviour.
if they were chewed by the side, the queen that laid first, seeked&destroyed other queens while still in cells (stings them), so the worker bees start cleaning them out at side.
you did right by destroying the rest of cells, at least in my opinion, nd i think many share this opinion.