This can be confusing. Just consider one phase, it doesn't matter how many phases it has.
If there is a coil under each magnet ( the magnets have alternate polarity NSNS etc.)then the emf induced in each coil as you go round will be of alternate polarity. To keep things additive if the coils are all placed the same way then you need to reverse the leads to alternate coils start finish finish start start and so on. You can get the same effect if you reverse alternate coils and join start to finish all the way round.
If as in some windings alternate coils are missed out then you have coils under like poles. in that case there is no need to reverse any coil and the things connect start to finish all the way round.
If you take the common 12 magnet 9 coil arrangement even more coils are missed out per phase and that one works out with no coils needing reversing in any phase.
Unless you fully understand what you are doing then choose plans that work and stick to the plans, don't get ideas from more than one design and start hybrids that is asking for trouble.
Flux