[Spoilers] Crimson Scales Cross Horns question

The character board for the Chieftain states:

Mounted summons are under your control. At the start of your turn, the mounted summon performs Move +0, Attack +0 with you controlling the abilities.

Since summons take their turn immediately before the summoning character's turn, and nothing says mounted summons skip their turn, does this mean that on the Chieftain's turn their mounted summon essentially gets two turns? It's own and then the move and attack abilities at the start of the Chieftain's turn?