[whpalmer4]

It sounds like you have selected View->Attachments->Display Inline. If you switch to View->Attachments->Display With Tags you'll see those URLs displayed differently. Go to the Preferences and turn off the option to make typed URLs into attachments. Now go to the URLs you want to fix, open the disclosure triangle on each one, select the text in the bottom line, copy it, and paste that into the document in place of the attachment block. I'll bet that anyone who figured out how to make an Applescript that could automate doing this for an entire document would make some friends if they contributed the script...