Sorry, I do not have Live Photo gallery to verify, but here is my guess.
If you are talking about standard Win 7 feature called ''Libraries", those are not actual folders
, but rather a "virtual folders", which could show content of several folders from different locations at the same time.
Please try to import those pictures from actual locations. To find out actual location of the file/folder you need to right click that file/folder and check it's properties.