Hi Meghan,
At this point, if this still isn't working for you, I would advise you to call into the Method Support Line so we can troubleshoot this further, you can reach us at 1-888-925-6238x2. You could also send me a private email on here or the email in my signature, include your Company Account name and contact information for yourself, as well as a specific PO that we can see this issue with. If you do email, it would also help if you can turn on Method Support for your account. This can be accomplished by going to Customize->Users, then locate the "MethodSupport" user, and make sure there is a checkmark in the "Active" Column.
-Ben