Ok so I got one that really threw me.
I have a lookup field on Tab 1, referencing Tab 3, I need that info in Tab 2, but rolled up, so I created a rollup field in Tab 2 that rolls up the lookup field in Tab1 (Tabs 2 & 3 aren’t linked). The contents look like ABC, DEF in Tab 3, and the lookup field in Tab 1, but the rollup field in Tab 2 produces “ABC, DEF”. Where the heck did the quotes come from? Using ARRAYUNIQUE. Get this, I go back to the original record, ABC, DEF and change it to ABC-DEF and bam, no quotes any more!! I’m really confused, if anyone could make a suggestion would be much appreciated.