Hello Danielle,
I think to allow identification of your problem with images you will need to be specific with how you are trying to add images to a post.
A. Are you attaching them directly to a post iusing the "+ Attachments and other options" tab at the bottom of a post?
B. Are you adding a URL from an external web site for the image
C. Are you using the MBMI image site - accessible via the green button?
D. something else...
Also what if any error message do you get - any information e.g. step by step detail of how you are trying to add an image would help idenfity the issue.
Regards
C-3PO