OK so running the 'Get list of rows present in a table' action works for me with a filter and a single field in the 'Order By' field

But when I try to sort by more than one field it fails

I've tried different fields singly and in combination - I can sort by any field I like by itself.
According to other answers here, separating by a comma should do the trick, I've fussed over and over but can't crack why this isn't working.
Can anyone offer any insight?
Thanks
Michael