Hello Christopher,
I don't think extensibility configuration has specific config for a MABS version.
After I found out it cannot build at 6.3.
I've try to build it at:
1. MABS 6.3, remove all extensibility configuration. iOS failed, android success.
2. MABS 7, remove all extensibility configuration. iOS failed, android success.
3. MABS 7, add config back to extensibility configuration. both failed.
4. Now: with extensibility configurations, MABS 6.3, both failed.
The build details, version and build date, will not update at this page if the app was not build successful.
Therefor the Android version has a updated version number. iOS didn't update.