Do other areas of the US have so many oddly cut up rural properties, or is this a FLa thing? I know a lot of our property lines and all have to do with maximizing the number of lots that can be sold as water front, sometimes leading to some bizarre shapes.
Short answer: yes.
Longer answer: This part of PA went thru a lot of "revitalization" at the hands of the Army Corp of Engineers, ca.1970. Many of our historic towns were in decline, as shopping centers built on the outskirts were pulling business away from all the legacy Main Street shops. Towns like Montgomeryville and Langhorne accepted federal funding, to let the ACoE come in and re-map the town with highways and drainage, which pretty much destroyed the "old town" character of these places. Other towns, Doylestown being the most notable among them, fought this trend and benefitted enormously by going "rogue" with their own locally-organized revitalization efforts.
Part of this ACoE work was the creating of many man-made lakes, such as Galena and Nockamixon. These were all created by damming a creek or tributary, and flooding a valley, using eminent domain to buy up the farms that would be flooded out in the process. You can still see the foundations of many of these old farm houses under Lake Galena, any time the water level gets low.
The area where I live now was slated for similar treatment, until one very wealthy resident took it upon himself to buy up a few dozen of the local farms dotting the valley. As he was a high-ranking Federal official, he had the pull to combine, split, and rezone the whole area into such a mess, that no future generation would ever be able to put Humpty back together again. By that, I mean if you own more than 15 acres around here, it's almost certain you have easements both to and from your land, through, around or across your neighbors. This mess was created very intentionally and deliberately, to prevent any future developer from ever being able to put together large swaths of contiguous property.
So, our area has maintained its very rural feel, a small hole in the donut of the greater mid-Atlantic megalopolis stretching from DC to Boston. The man who did all of this is long gone, but his grandkids still live on one of the larger and nicer farms he once occupied, and a park he had donated to the township surrounds my present neighborhood.