Probably Nordeus believes that your team can always win or at least keep in top 3 and promote you accidentally.... I am joking only.

I don't think it is acceptable to promote teams at 12th place as they are not ready for next levels. If there are not enough teams in high level and better solution like combining servers is not feasible, I rather want them not promoting some top 8 teams (but for limited no. of seasons only). I assume that the low ranking teams are lower in quality. The low ranking teams more likely narrow the quality gap in a lower level because adding 5 star players can help their team for more.

BTW, league draw have not yet officially completed today (season day 2). I suggest you contact support to object for promotion.