Here is the issue, If I try to make the change you are describing, I dont see the problem.
I need you to point me to a page where _You_ have made the change.
A page that demonstrates the issue.
There is something unique to how you are applying the h1 tag, and this is what i need to see.
If i login and make the changes, I dont see any problems.
Please point me to a page where You have already made the change that is causing the issue, only when I can see the problem in the browser will I be able to terll you what is causing it.