I am pretty sure this is the bug we had with version 1.20.10. We released a fix very soon after, so I think what happened was that you were running 1.20.10, experienced the bug, made this report, and between then and when you checked the version number on the About view the app was updated to 1.20.11 (which fixed the bug), either b/c you manually reinstalled or it automatically updated.
The Play Store is a bit weird about what version it installs when you reinstall. I reinstall a lot in order to test different versions I often find that when I install something from the Play Store and then return to the app in the Play Store I immediately get an option to update the app… that I just installed. Is there a moral to this story? I don’t know. Beware stores bearing versions? Install twice, run once?