Just when I was feeling pretty smart.....
With some help, I created a new php.ini file for my site, which is working correctly. The purpose of creating it was to be able to upload files larger than 7M
I changed the upload_max_filesize to 20M and it still won't upload the larger files.
I also tried increasing the max_execution_time and max_input_time, neither of which seemed to help.
Does anyone with more experience have a solution? Thanks again!