In an experiment, I started with this task:

Then I decided to split the work assigned to Akshath Hegde, by adding a new resource.
I pressed the

button next to Akshath.

A window popped up, in which I specified a new developer.

I noticed that ProjeQtor had automatically assigned 15 hours of work to Sangeetha.
This was logical, because Akshatha was assigned 30 hours earlier.
I assumed that now Akshath is left with 15 hour of work.

But the final result shows that now Akshath is left with no work at all! [BUG#1]
The total hours for the task are reduced from 45 hours to 30 hours now. [BUG#2]