Weird bug in DotP regular (NOT 2012)

I had posted this earlier, but deleted it because I suddenly got the idea I was in the wrong section (saw "Programs with AI or Rules Enforcement" and thought this was specifically for creating custom DLC or something)
But in the end it was good I suppose, as I have ran some tests since then. Here's the original post:
Also, I tested the following:
Core game with DLC #1 only: no problem!
Core game with DLC #1 and #2: problem!
Core game with DLC #1 and #3: problem!
Core game with DLC #2 only: problem!
Core game with DLC #3 only: problem! (same for 2 + 3)
This second problem is fixed, but I leave the text here so the forum posts make sense: And one short question afterwards (not important, so another topic would be a waste): for DotP 2012, I got my hands on the Deck Pack WADs (and the DLC one, but I of course already unlocked everything already through editing the main wad). Everything works fine, but tooltips ("do X action") are undefined strings. Any fix for that?

Since then, I downloaded a different set of Data_DLC_0005.wad and 0006.wad: problem persists. I also downloaded the main game from a different source (unfortunately, not much choice for both), but same problem again. So, it's not just in the download I started with.Nicol Bolas has taken control over 3 characters, or so it seems. In Custom Duels, Rhys is replaced by Nicol Bolas (picture and deckname). Once I duel it, however, everything's back to normal, including the Custom Duel information once I'm out of the duel. Until I go to another NPC and go back, then Rhys is Nicol Bolas again all of a sudden! A few characters further Nicol Bolas has taken over Sarkhan with Edge of Madness, and finally the last appearance of Nicol Bolas is Sarkhan with his dragon deck (he really hates Sarkhan, doesn't he?).
This causes another problem: all images and decknames (but not character name fortunately) have shifted because of this. For example: After Rhys comes Sorin Markov. But I see Rhys's picture and deckname! The Planeswalker after Sorin Markov also has the correct name, but has Sorin's image and deckname! The shift starts like this: Chandra Ablaza is still normal, and then it goes to Rhys who has Nicol Bolas's picture and deckname (and then to Sorin like described...). Because of this, some are even shifted too far (for example, I can still duel Tezzeret as described above, but I can only find his name: his picture and deckname are shifted too far).
How to solve this? I have already reinstalled the game: didn't solve it. Oh: I have 19 opponents in free duel, how many are you supposed to have (all expansions)?
Also, I tested the following:
Core game with DLC #1 only: no problem!
Core game with DLC #1 and #2: problem!
Core game with DLC #1 and #3: problem!
Core game with DLC #2 only: problem!
Core game with DLC #3 only: problem! (same for 2 + 3)
This second problem is fixed, but I leave the text here so the forum posts make sense: And one short question afterwards (not important, so another topic would be a waste): for DotP 2012, I got my hands on the Deck Pack WADs (and the DLC one, but I of course already unlocked everything already through editing the main wad). Everything works fine, but tooltips ("do X action") are undefined strings. Any fix for that?