General Question for Working with Tasks

Hi,

I´m new to projeqtor and new to the forum.I started with this software to manage a private project.

I have problems by using the Tasks in projects.

These are those 2 problems (I added screenshots for each problem):
- When then "editet" checkmark is set I cant remove it anymore. Is it possible? If yes, how? (screenshot 1)



- When a planned start and end Date is set I cant remove it anymore. I even cant change it. Any tips? (screenshot 2)



- I cant manual edit the progess in procent of the Tasks. Its always on 0 %. Only if I set it to "done" it goes to 100 %. How can I edit it manual? (screenshot 3)



I hope someone can help me, cause I want to continue use this software.

Thanks.

Andre