My guess would be they think that the 10 man faction won't have any guys on at these random times, but a 60 man faction will always have some players on who play at non-prime time hours.
My guess is that bad battlefield commanders clicked on a fief and did "attack". As for the two open field battles, both of those guys don't work during the day (AFAIK) so that's prob why they attacked when they did.
Either way, would be nice to do the battles in the evening...
The only nighttime setting that matters is the defenders...it will push the battle back to after night time. I suppose if you attacked during your own night time it would push it back as well...but that would be pretty foolish if you attacked during your own night time setting.
Also, SaleHope was part of Papal Guard, who were a vassal of the Hospitaller. When they broke up, SaleHope kept his allegiances to the the Hospitaller faction.
When you attack a sovereign fief, you risk upsetting any friends they have. Thems the breaks.