A question on the other side of this--how long does it take for new reservations to show up? Is it about 2 hours as the web site indicated?

And is there a limit as to how many reservations can be shown in the active reservations? I made a couple of reservations that I now want to cancel so I can make some new reservations (they're all at the same 2 hotels, but on different days and they'd "conflict" with the new reservation).

Or can one make mutliple reservations that might conflict with existing reservations, as long as I can cancel some of them in a timely manner?

Thanks!