Error with gantt

1) Did you re-claculate plannig of your project ?
2) can you show print screen of the project detail ?

You project has 2 days of left work.
So these two days are always planned from recalculation of planning.

If depends on "consolidation of validated work" option you selected on global parameters screen.
If you did not change defaut value, consolidation is "only if set".
This means that if you have sturture like
A
...B
...C
......D
......E
You can for instance define validated work on B and C.
Sum will be consolidated on A, so validated work on A is locked (because it is calculated).
If you don't set validated work on D and E does not matter : zero values will not overwrite existing value on C. But if you start and entrer validated work on D, you have to also define it on E, as sum will be consolidated on C.

Hope this is clear.