When placing your commander in the commander slot for the EDH variant, the remainder of the deck is 99 cards, which Deckbox sees as being incomplete. Not a huge deal, just wanted to point it out.

i just saw this today too. any way ya'll can just make the count 99?

Unfortunately that's not the best solution. Since deck variant tags are a premium feature then only those users will be using the commander slot and therefore only they would have 99 card "complete" edh decks. Non-premium users will still have 100 card "complete" edh decks. So Sebi will either need to make both 99 and 100 card decks maked as complete, or add code to determine the user type and set the complete card count accordingly. Neither option is particularly attractive to me. A third option would be to make deck variant tags available to all users.