Can chain of command make you do height and after leave even though I completed it at BLC in august. Don't I have a week after leave?

I know that the new guidance encourages (doesn't mandate) a week between the APFT and weigh-in (almost nobody does that though), but I've never heard that a Soldier is entitled to a week grace time after coming off leave.

Was this a scheduled weigh-in or are you being singled out for some reason?

Sweet Mary Mother of......Yes. Yes Commanders can certainly have you perform HT/WT. Whether this is after BLC or even after Leave. Hell, if they are so inclined, they could recall you from Leave in order for you to HT/WT. Granted, that would be an uber DBAG move....but they could certainly do it. Get yourself familiar with AR 600-9. Read Section 3-2c, for starters. Just read that entire thing.