Your second post makes it clearer what happened but I think it's not that you were displaced ... it's that they are now selling Preferred with ease, filling all the available space so a past "policy" of letting some early arrivers park in "Preferred" for free is no longer happening.
Preferred started and still is in Aladdin (I think the area you are speaking of) and Jafar. Sadly both those areas up front used to be for Handicapped Parking because MK is severely short on those in their official blue line/sign area. Once Preferred came they shifted those folks to Zurg (former AAA Parking). Zurg can be a longer walk for those who utilize the Handicapped lot ~ was never a good option.
We noticed this trip for the first time in awhile we were directed to back rows of Jafar one day arriving around 11 with Preferred in front of us, then on the next day arriving at 9 we were the front row of Jafar. Aladdin was all Preferred, and maybe they sold Preferred to fill Jafar .. we didn't come back to car until midnight so not sure how full it got.
To help visualize:
NOTE: While it says all lots are walking distance this certainly isn't a good scale to know just how far. We once had to walk after a party and well ........... it can be far and very dark at night.