Seems the filter functions were not unregistered properly at changing the guild stores or guild banks (and they all got the same name so they were tried to be re-registered next visit and it says it was already registered).
Try this new version including new "non-using LibStub" LibFilters-3.0:
https://www.esoui.com/downloads/file...=1180#comments
-> You need LibFilters-3.0 to use this plugin!