It can be an issue though for availability. Sometimes standard awards aren’t available for just one night, but are available for say 3 nights. So when a rep tries to book they can’t. I’ve had this issue before when mixing certificates with different honors numbers. I Could book two nights but when the third is booked separate it is a no go, so then had to get creative with points. Also confirming my past reservations and this one were one reservation and not separate nights that were then combined at the hotel.We've done this, too. I think, technically, this is booked as individual nights and then the reservations are combined after-the-fact. But, even if you complied with that the agent said and had them book three separate, consecutive, nights, the hotel could treat them as a single reservation anyway. We've done this as well.
Cheers.