I have an app on Google Play that, after an update, always shows the update button. Even if it's already updated and the latest version is shown in app settings, Google Play keeps asking me to update it. What can the problem be? This only happens with this single application. I tried to delete all caches and data (both for play store and the app), but with no results.
We had the same problem, we think it was a bug of the Play Store, because there were more people reporting the same behavior.
To fix it, we simply re-upload the app with a higher versionCode.