Hi Jenn, if you flip to HTML view in the editor, you’ll see some blank lines and extraneous code, like this at the top of your most recent post, for example. I’ve screenshotted just a portion of it, but the stray lines and div tags go on throughout the whole post:

Remove all the blank lines, non-breaking space tags, and extra div tags. Ideally, remove all the div tags, as they can cause issues when accidentally left open.
To prevent this issue in the future, be sure to paste in content as plain-text only, if you’re copying over content from another location. You can either convert to plain text in a text editor first, or use the “Paste as text” button on the second row of formatting buttons.
Just let me know if you need further help!