HOTU Spoiler The bridge to the Beholders

[MudKipling]

Highlight to read I have 2 baby Tynan's from the SOU expansion... does anyone know how I can get 2 Tynan's Tops that will allow me to summon both the goblin and drider form of the little guy? I pushed both buttons but when i went to use the tops all I got was 2 goblins. On a side note... i summoned 2 goblins, rested, summoned 2 more, and then rerested and summoned another 2. all 6 were in my party along with the drow and tiefling.