Server problems - incomplete commands

We also have the problem lately that the banlist will not allow changes and duplicating entries I wonder if they are somehow related?
A problem we also had for the longest time is the server message getting distorted. Sometimes showing parts of the asay command, breaking off sentences and/or showing strange characters not even in the message.

Also, what does the watchdog feature do?

I really don't know if all problems were fixed but I tried to do some
repairs using this thread: Server bugs .

What didn't work that way, I just deleted the config and created a new one.
I planned on using different ports as Feld also suggested to me, but it looks like
some of the problem did fix by themselves. What I mean by "some" is that I had to
delete the Private server, which at some point had 2 instances. This also happened
in the past with other server configs.

No idea if it's just server manager bug or something else.

Today's check seems to have two private servers again. I delete the one with its status
of "none" and the Server Manager deleted another unrelated server from the list I'll try
to redo everything again and see if I need to check other configs as well.