@_Bladefury
I've also had issues with the DLC, specifically relating to combo packs. My achievements took awhile but eventually both games are at 100%, as they should be. And I think all but my Orlesian Wardens are there, though I might have to doublecheck once LBSN is up properly. Anyway . . . .
My feeling, (and I've already reported this via feedback) is that if you have all the items in a combo pack then both the individual as well as the combo should show unlocked. Or maybe not show the combo packs in your 'career' section at all. Just show the individual items purchased regardless of whether it was via individual transactions or part of a bundle. I suppose it wouldn't annoy me as much if it didn't have a big percentage over the section. (Or maybe it would, even if it's a minor annoyance).
Actually, now that I think about it, why does anything but achievements even need a percentage completed? Choosing to purchase DLC or unlocking certain rewards . . . those really have nothing to do with how you played the game. Why do I need to know what percent of DLC I purchased for a game? I'll stop now, I haven't had enough coffed, I think I'm beginning to ramble and I have Halloween decorations to put up . . . . . . . Bye!