It's just the new way the standings work, rather than a bug. You might remember in the past teams had to do a race before they would appear, but that is not the case any more. All teams show up all the time now.
The previous season standings remain on the league info page until the new season starts (after a race).
Since there's already a thread with the proper title I'll post in here.
In the Formula GP league, Season 10, we had 7 managers in the Pro tier causing promotion to not be enabled due to not having the required 8 managers. At the end of the season the system promoted 2 managers to Pro from Rookie, then immediately promoted the top 2 in Pro up to Elite even tho there shouldn't have been any promotion according to the game.
Is this working as intended? Or is this a bug since the 2 managers promoted from Pro to Elite are shown in both tiers, and the 2 managers promoted from Rookie to Pro are shown in both tiers?