I would say the odds are very slim that you got two duds in a row unless the dealer you purchased from is less than 100% and these were used and or floor models and then resold or worked on by a tech that didn't know the set up for this guitar.
Here is what I would do
1) Contact PRS - PTC
https://prsguitars.com/ptc
THEN
I would set the neck dead straight with no string tension ( most I my PRS need very little relief )
While your strings are off check the bridge screw height , drop the bridge on the body measure from bridge to screw heads 2 - 2.5 mm ) use this video for reference
I would also pull the neck and see if there is a shim in there already or not.
I had one I worked on that had a shim and one I liked even better after a small shim.
I like my guitars necks to be level with the body or the headstock slight down , you should be able to get a nice straight line ( I use an old low E string ) between the nut and the bridge
The neck should be really close to level with the string 100% of the way ( IMHO )
Reinstall the neck , don't over tighten just good and snug.
String it up check the action at the 12 fret , I start at
.061 ( 1.5 ish mm ) on the high e
.064 ( 1.55 mm G )
-068 ( 1.7 mm E )
Check the relief ( frankly I just look for a bit of string bounce capo at first fret , fret at last fret ( some do body joint )
I will try and shoot some pics of mine tonight if that helps , Lets see some pics of the guitar. also please
Best of luck