myrailey on "Why are all my recent posts except one showing up in italics?"

Hello again.
Blogsy thinks it is a CSS setting in the theme. Is there a way to fix that? That seems odd since I've been using the same theme forever and this has never come up before. The italics are only on the home page; if you click and view a single post, all is right with the world. I just don't understand what happened with the home page. I thought I could go in and repair CSS but it looks like if that is what it is, I need to upgrade to Custom. But, that still makes no sense since this problem just cropped up this week. The posts looked fine on the home page (even those that are now italicized) on Tuesday, but after that, not so much.
Help, please? Thank you.