Quote available space "limited by restrictive quota" from container folder

[dgsmith]

I have a cluster of students in one group who seem to have inherited a shared quota from the top-level of their folder tree and hence FSRM says that their available space is "limited by restrictive quota of xx on [drive path]". Even though every cohort folder seems to be configured the same way, only one of them shows this restrictive quota. I can't see anywhere to disable or change this config! Anyone got any ideas? Haven't had much luck google searching either. Ultimately this means all students within this container are sharing their container folder quota, even though they have individual quotas set also.