Then I'll go file a ticket with Tes5Edit. You can't have more than FF load order. (Really, FE). Period. And fine, plugins. (I keep forgetting MO allows BSA unpacking) If you really need to merge more than 255, merge them in batches, but you really shouldn't allow 255. Because here's the thing: you can click "run" from that order even though it's intended for merging. It might not be a bad idea to ONLY allow it in a merging framework, and disengage it otherwise. I.E you have to tell it, specifically, to merge.