Ulduar transmog sets

I noticed there’s something wrong in the collection tab with the Ulduar transmog sets. I noticed it with the rogue set: years ago I went out of my way to get certain rogue pieces for a transmog of mine, and they were purple with green. The collection tab only showed a completely purple set and a red with purple set. For both I have 0 progress. ANd while just running the raid again I only looted the purple with green pieces again, which are not portrayed as either the 10 or 25 player set. So my question is there somewhere else where i can get these sets portrayed? IS the collection tab just bugged? What’s going on here? And does it affect other sets as well then?

Also I’ve run ulduar so many times from when it came out on all of my alts until I got mimiron’s head a couple of years ago, so there’s no way I still have 0 progress on most sets

They are not tier sets unless iam mistaking so they are wearable by druids and rogues back in the day so will be under none class set.

If you open the transmogs collection tab in wow and search for ulduar, it has a specific set per class for 10 and 25 player. I’m referring to the ingame feature that wow itself has provided and there it does say that rogue has these 2 specific sets.

Some of my sets are complete but greyed out, like the Ulduar 25 man set that needs fireland gear! to complete or the set you get for killing Odin same deal.