Has anyone snagged two of a certain item? Say a single buffet or lunch is shown, and you have the points to double it. (For two people). I guess that would count as 2 comps. but would they let you do that?
the terms of the comp says 1 per person. That said you could get a buffet for 2 and a buffet for 1 at the same buffet. Also its possible to get 1 per batch, although no one know exactly how long a batch exists, for example a reward disappears for weeks and then shows up again - that's a new batch. That said - its possible that they wont let you reedeem multiples on the same day too.
Steveorama is correct. The only way to do this is from separate batches and there is no real way to know when it is a new batch. Generally if it went away for sometime and came back, you should be safe.