Do you have extras-devel enabled? Then it can easily happen if the developer uploads a new build (package) of the same version each day.
At least it happens to me, as e.g. I did the new version of Recaller, uploaded a build, went to sleep, worked for a day, came back in the evening, tested the new build with my other device, found missing dependencies, updated the build again (but kept the software version as this didn't change), uploaded it once more etc. etc. :-)