You read wrong. The Governor has to specifically add all agenda items to a Special Session. He did add this one late in the Session when he found out that Patrick had enough votes in the Senate. http://blog.chron.com/texaspolitics/2011/06/perry-adds-anti-tsa-bill-to-special-session/
My error. I thought the anti-TSA-groping and the anti-sanctuary-cities/immigration bills were both calendared by the same process, viz., by the expiration of the regular session. Gov. Perry and Lt. Gov. Dewhurst wanted it to die in the regular session, after Perry had taken political credit for the "gestural politics" of putting it on the agenda of the regular session last spring.
The sanctuary-cities/immigration bill was definitely brought back in by the senate Democrats' maneuvering in running out the clock on the regular session -- a parliamentary maneuver and mistake on their part, that created a headache for Perry and Dewhurst.
I thought the anti-TSA bill was one of those issues recalendared by the Dems' mistake.