Issues With Premium Deck Building

I can not add D-era cards to a premium deck, notably trying to add overtriggers.

Hi there, can you give me an example of 1 premium card in your deck and 1 D-era card you are trying to add? Thanks! 

I had a small issue where I needed to add a premium card frist before entering in a set of V era cards (A small issue, but has an easy work around). Howevere no matter what order you add an overtrigger to a non D-Era deck, it will tell you "You can only have one type of clan in a deck". My exact example being trying to add the Dragon Empire Overtrigger to a premium Shirayuki build.

Just want to bring this thread back up since I'm encountering similar issues to what the op described. I'm trying to add Keter Sanctuary triggers, including the overtrigger to a Premium Genesis deck and I'm getting the same "You can only have one type of Clan in a deck." error message. Tested it really quickly with Shadow Paladin and same thing.

Building Gyze decks isn't possible atm either.