Hey @eshotsinc I recommend creating a blank page where you add a rich text element and give it the class of "blog rich text" which you're using on your blog page.
Then you can highlight and add span tags to different elements to style what each text element looks like. So styling H1, H2, H3, H4, H5, H6, paragraph, block quotes & links.
There's a tutorial video on doing that here as well on styling Rich Text Elements: http://help.webflow.com/faq/how-to-style-rich-text-elements
You can't style them directly on a dynamic blog page template, but you can style a Rich Text Element on another static page which will then carry over those changes to your blog.
When you're pasting in your blogs from before. I highly recommend pasting them in as Plain Text. You can right click or ctrl click and there should be an option to "Paste As Plain Text". That way you're not pasting any of your previous blogs in with previous formatting. I hope this helps!
If the double scrollbar persists can you please e-mail support@webflow.com? Also, which device are you editing on, does it happen to be a touch screen? Hope we can get this resolved ASAP. The site is looking great 