Question on PA Tax sale properties

[Twitch Raid]

I am looking at some Repository list properties, due to these being on this list it is to my knowledge since they are from judicial sale they will be provided with a free and clear title.

I am noticing 2 things on some PINs either the pin is for a "improvement only" (trailer, garage etc) or the name on the repo list does not match the most recent on the GIS pin.

With these situations does that mean if its improvement only you would only own the trailer for example and not be able to do anything with it as the land is still theirs? 

And in cases where the pin is in another name does this mean that if I purchase it through repo I will not be able to stake claim to the property or will it simply just be an eviction on my part 

(I understand no one can tell me specifically on these items I am just looking for advice)