APK upload error different certificate

I am trying to upload the 1.1 revision to my two apps to Google Play. I get the “different certificate” error that has been mentioned in other posts on the forum.

The problem is, I have only made two key stores (one for each of the two apps), and have them both in the same directory. I checked the dates of creation (May 20 and May 22), and they are definitely the same two files that I used before. They are clearly named after the two apps, so that I can keep them straight.

I have tried uploading one app with both key stores, even though one of the key stores is obviously wrong. In both cases, I get the same “different certificate” error (but with different fingerprints in the two error messages, so I am definitely using both of the key stores).

I am using CoronaSDK-2014.2318 on a Mac. I just pulled the daily build CoronaSDK-2014.2354 but have not yet tried building with it.

If anyone has any further ideas on how to get out of this situation, please let me know.