Despite having a couple different official sources, both AFR.c and floppy.c from the fellow amiga emulator says that the even bits come before the odd bits.
This is true in the sector header decoding as well as in the data decoding.
I haven’t extensively manually tested this, but it appears to be working OK for their routines.
It is pretty odd, no pun intended.
While I don’t think it matters much, I find the discrepancy to be unnerving. While I can’t provide online links to most of the sources, the sources were CLEAR in the fact that the ODD bits were first to be written and then followed by the EVEN bits.
Its 1:47am and I need sleep.