Ok

I actually had a cpl slimes follow me around once when i was in Valdeholm. They didnt attack me, would stand right on me for a cpl mins then disappear and about 5 mins after they left they come running back and do same thing. I blamed the paladin that was in group.
 
The blobs are not KOS.

This is a know bug in Valde that they follow you around and stack up lately.

Hope this helps..
 
It happens, no need to freak out. I've actually gotten wiped by that bug a couple times, as somehow I agroed them a time or two. I dunno what exactly causes that though.