How different is the prop orientation? The system won’t override all this and it’s best when same props are oriented the same way in the first place, so it will be much easier to manipulate Rotation settings later.
Don’t forget to select Z axis only in the “Rotate To Actor By Axes”, I think that’s also what you’re looking for.
And there’s actually no support for even and odds instance alternation… Sorry, that behaviour was never intended, only full randomization.