Help Needed To Fix Some Security Problems In Persistent USB

I have three security related problems in my parrot os home (encrypted persistent). The first thing is that I have changed the password for both root and normal user that I renamed, then too if in the login screen I enter the default password toor it unlocks successfully!

So basically now my changed password and default password both work in the login screen even though I have changed it to something else. Another problem is that even though I have renamed my username from user to the name I want, in the terminal it still says user.

The last problem is that sudo or any root related commands don’t ask for any kind of password that I have changed (mentioned earlier).

Any way to fix these problems?