Powerpoint: title doesn’t center

I have a Powerpoint slide where I center the title. But after saving and opening the file again, it is left aligned. Is this teh template, or a Powerpoint bug?

It’s due to the master. What you can do is delete the text box with the tiotkle, and create a new one. Put the title in that new textbox and format the title as you wish. Since that textbox is not tied to the master, the master won’t influence it.

(thanks to Echovoices’s suggestion in a PPT NG)