Hello! I am replaying/editing an 11 quest custom Saga I made back nearly 18 some years ago for DII. I'm very happy to see that GOG managed to get it working on Windows 7 (on Windows 10, I had to get the wrapper fix) ;) This has been a lot of fun!

While streaming the end of my 10th quest, the Saga came to completion and ended with the option to export the main hero. Kinda odd. I've been testing this, and now I wonder if there is a 10 quest limit or something...

My test:
In the editor, I moved my 11th quest to the top of the list order. Created a new game, and it started just fine with the imported leader. I streamed this one just so I had a completion on my Collection for Twitch. So... I know the 11th quest is not bugged.

Wondering if the 10th quest was bugged, I moved the 9th and 11th quest to the top of the list (adding overpowered units in key places to finish the quest real quick). Worked just fine and linked correctly to the final quest.

Then I tried moving the 10th and 11th quest to the top of the list, with similar overpowered units in quest 10 to make it end fast, and it worked perfectly as it linked correctly to the 11th quest.

.....so...... is there an actual 10 quest limit to custom sagas???

English saga in english editor in english game version?

There is something with starting parameters for playable(and AI?) faction (so, for Capitals). Did you create scenario in editor, or use pre-existed scenario? Maybe even save game?
It can happen if you wrong set Capital faction\playable\AI-only, or edit starting leader. Maybe you use save with some leader placed in Capital garrison?

Sometimes some bugs happen in Editor and in scenario in game. I dont know how - it never happened for me, but it possible to add units and artifacts to garrison placement leader - and they can keep in party when game replace leader to one that selected by player.

Also, of course it possible to change scenarios with HEX-editor (eg HxD). And if you use pre-existed scenario\savefile you must do it - HEX edit them to remove original campaign or skirmish mark (skirmish is "campaign 0" - actual key codes present in CCamp two files).

You can ask here, HSerg is more familiar with this bug - but probably because russian versions bugs?
http://d2ext.sklabs.ru/en/guestbook/1
If that true - and game have 10 scenarios limit - than he must know this.

P.S. Verok's GLwrapper is a mod - so some bugs happen for exactly modded game version. Especially with some additional tweaks and additional files (color correction and Wrapper.ff).