There is no problem.
Also to your first post on this thread;
Pretty sure they stated there's a levelcap.
And let me ask you, honestly, what you believe is more likely for Divinity: Original Sin knowing what type of game it is;
* Some completely standalone piece of content that can be fit anywhere since it has no relation to the main game.
* A continuation of the storyline, which probably holds half-a-dozen spoilers in the first five minutes and makes no sense at all to play until you completed the game.