There have been a few instances where cards are run before the limit is reached. Very few but worth noting. It appears that if you near your limit and it's quite early in your trip they may run it earlier than expected.
For instance, say you are at a Value resort for 10 days, with 1500 limit, and you reach $1000 after 3 days then you may find they'll run that card early.
I'm sure those are very unusual circumstances but worth noting that it has been reported to have happened.