My bullets in my tekst are changing automaticly.

My bullets are changing automaticly.
 I made a document and everything looked good and was just fine. But now when i want to safe the document it changes my (tekst) bullets. (In another font (teamviewer11host)and in another bullet(7))
Also when i just select it it changes.
 I tried and surched for any options that may cause it but, no result.
Pls help.