I downloaded a new version and that seems to have helped. I have a pretty fast PC, so don't think that was the issue. The sorting works pretty well, but not great.
A few notes when sorting my bank:
Cloth doesn't seem to sort into the same bag. I have runecloth and mageweave 4 rows apart in my main bank slot. I have runecloth in a separate bag as well.
Thorium headed arrows ended up in two different bags. I ran the sort again and it moved most of the stacks to the first bag, but left 1 stack in a 2nd bag. Yes, both bags are full, but there are various other item types in them that the extra arrow stack could have replaced.
Star Ruby/Sapphire/Arcanite/Arcane Crystals all ended up together, awesome.
Thorium bars, Mithril Bars, Dense Blasting Powder, etc., all ended up separate from each other.
Enchanting materials ended up in separate bags.
Anyway, the idea for this addon is great, it works ok. I'm hoping this feedback lends to future improvements.
Thanks bit.