Comic Issue 1 cover choice not updating

HEY THERE ....!

Not very social and probably an issue that has already been discussed buuuut... I tried updating the cover page of an issue in a series aaaaaand... Surprise! It won't show on my page.
It's stuck on the first page of the comic as a cover.... It's a bit bothersome.... What can I do to make it work...?
Or maybe the cover of my choice is not supposed to show publicly on my page under that issue...? 
Huuummm... 
Questions, questions!

Thanks for the help!