Verify that you are opening the correct cloned file. Check Automatically Open File, when saving another clone.
What version of FMP?
What Operating System and version?
Thanks for the quick response. I tried Automatic Open File and it opened it but still with all of the data. I'm using FMP 14 on a Mac OS X El Capitan. The file is just sitting on my desktop right now - it's not a server (yet - that's why I wanted to make a clone - to keep before moving it to the server.)
I have never seen this before. There may be an issue with the file. I would run recover on the file to check for errors.