So I recently imported a skin-pack from the internet, after I imported it I tried to select the expand button to show all of the skins but it didn't work. I clicked on other expand buttons on skin-packs from the marketplace and I noticed that it was expanding from the skin pack above it (no the skin pack below the imported one did not open the imported one. I decided to import another skin-pack to see what would happen and it still wouldn't open the two imported ones but now when I clicked expand on the marketplace skin-packs they now opened the skin pack two above it instead of its own. This is an incredibly annoying bug as now I cannot use any of the skins for the imported skin pack other than the first few. 

I also decided to open them on Minecraft preview and it worked just fine.