How to stop the table changin when opening a document

Hi,

I have the same problem on most of my documents.
When I open up the document the table is updated a bit.
Mostly the table in the header gets changed.
When I open the document I have to reset the table cells width each time.
Then I save the document and when I reopen the document I have to reset the cell widths again.
But not all, just some rows.
And when I check the table setting the cell has the option chcked about the prefered width.

Does anybody know why this is happening to me now?
It didn't before.

I've attaced the document.

Thank you very much!

Hi,

Ok so I've split the table in 2 and change the setting so they were the same.
I saved the document and re-opened it and it was fine.
But when I joind the 2 tables in to 1 again and saved the document and re-opened, the same thing happend again.
The last row of the table had a different width then the first 3 rows?

Should I just add a row under the first 3 rows and change the last row so it looks the same?

Thanks for the help!

So I have to seperate them, make the same settings and rejoin them back again and it should work?