It sounds like a timestamp issue.
If they have exactly the same date, then you should change the date of divine domina 2 a little bit so it's later than divine domina one; I don't know what happens if you try to load two mods with exactly the same timestamp, but better to be safe then sorry, and I guess that's what Wrye Mash is warning you about.
I was gonna do it, but I just wanted some answers first. I thought the creator intentionally made them the same date.
I just separated them by a minute, lol.