That PA. data is not right so please don't believe it! The definition of what qualifies as a cave varies from some counties to others. It all depends on who's doing the publishing lol. For example....Westmoreland County lists 330 caves and if by their definition of what qualifies as a cave is true then Huntingdon County has thousands of caves. So would all the surrounding counties. A hike up the side of any of those mountains in that region will have you going down so many holes in the rocks you'd get tired of it! You'd also be tired of finding bear, bobcat and rattlesnake caves lol. I know a few places myself where you can go a good ways into and through those talus caves. They are not listed as caves anywhere! I guess to some they're caves but not what I want to spend time in. I know for fact that the greatest number of limestone caves are within an hours drive of Mt. Union which is on the Huntingdon/Mifflin County line.
Looking at square mileage of these counties and their limestone cave count will show cave density. My files have 97 actual limestone caves for Mifflin County which at 415 square miles is somewhat smaller than some of those counties. I do not count caves that were quarried away or exist in folklore like some of the county database stewards do lol. There are also caves in Blair, Huntingdon, Fulton and Centre counties that are not in the database for various reasons. Some of these counties also list caves that no longer exist.
So while the list you posted could possibly be a guide of some sort I wouldn't fully rely on what's published there.