number of mails in cyan circels befor subject


how can i get rid of the cyan circel with the number of send and recived emails bevor the subject (and recieve all mails separately and not grouped under the same subject). Sometimes there is a green one, too. I have no idea what the green one does.
My wish is:
I will recieve all incoming mails with separate subjects, no grouped mails, like it was bevore the update to groupwise 18.
I pushed the button to restore the GW2014 settings, but the circles stayed there. I allready switched it back to colums and deactivated the preview.
What else have I to do?

thank you and greetings

It's a long time ago, I had to comunicate in English, sorry for wrong spelling and grammar.