Headings wont work now. I dont know why I have an extra blog.

I am using ‘The Morning After’ theme. I have 3 blogs. On only one blog (endtimesprophecies.org)today when posting the headings they are now tiny & not noticeable as either the main heading & also within the article. I did not change anything but they changed by themselves & wont work. They wont change back to the right size as they should. It looks dreadful & is confusing to the readers. I cant fix it. This is also the only blog I bought as an upgrade bundle.
Also, when I paid for this 3rd blog, for some reason I was given an extra 2 instead of 1, with the same name on each originally. Of course i am not using the other one as I presume this was a mistake made by wordpress, but am wondering why it is on my list of blogs. It seems that I was not billed for it, but am worried that I may be billed in future times. Please explain why it is there & if I would have to pay for it each new 12 months if i did use it, or is it part of the bundle (but I dont think so? Thankyou!
Ps – I cant use codex so pls dont ask me to change that.