Sometimes during building APK's and building for Win/Linux/Mac, dev's forget to change build numbers.
Did you verify by seeing if there is new content and loading an old save.... or checking by going through it?
I've seen this a lot with games, where build numbers are marked as old ones but there is new content and it is the new version, so this is "just me" double checking to make sure you checked thoroughly is all.
If it is in fact an old build, you will have to wait for the "proper build" or wait for someone to make an Android port which probably won't happen until it's on the front page and people know an update for this is actually out