This is due to the social networking site changing the way they tally the Page mentions on the social network. They are limiting users to one check-in for every page per 12 hours.
Facebook released this statement pertaining the change:
“We will be revising the total check-in number on Facebook pages to provide a more accurate picture of how people are visiting your business. If someone checks into your business multiple times within a 12-hour period, that action will be counted as one unique check-in. previously, if an individual checked into your business multiple times, each check-in was tallied toward your page’s total number of check-ins.
When people tag their friends at your business location and upload a photo, those photo tags will be counted in aggregate. For example, if someone uploaded 20 photos to an album from a specific location, we’ll now count that as a single check-in. but if someone checks in to a location and tags five friends in the photo they upload with the check-in, the total check-ins number will be six – that person’s check-in plus those for their five friends.”
This seems to be a fair, reasonable and logical choice for the social networking magnate.