Ok, I tried to completely isolate the problem. Ill be using images now instead of links to a project file, I thought that would be easier so you can check my calendars and configuration of the project, but lets go.

So I have this Resource 1, which originally had 2 Tasks. Task 2 depends on Task 1, so everything is easy so far.

As you can see, project starts on 16 Jan, and everything is going ok so far. Bad news is, on Jan 30 we get this emergency and that Resource 1 needs to work on that for the whole week. That tas is marked as "Unexpected task", and since this actually happened, I marked it as Manually scheduled for those 5 days. Right now, it overlaps with the expected task for those days, Task 2.



Now, I expect the "Task 2" to move rihgt after "Unexpected task", since its the only available space left. The problem is, when I hit the Level button, I get this.



Project doesnt have a final date, it can go on as long as its needed. What am I doing wrong?

Thank you very much.