Hi Dawn,
I know nothing about TS but from what you have discribed with Anthony jerking around a little it could be juvenille myoclonic seizures (jms) this type of sz. often happens to people with absence (petit mal) sz. Take note and notice if Anthony jerks around when he first goes to bed and when he first wakes up in the morning because this is the time it happens the most.
Also in regards to activity going on, the e.e.g. should pick it up because unless the activity is to deep in the brain. Often during my simple partial sz. I will see colors flashing back and forth in my eyes and have a nervous feeling in my stomach then it leads into a cp sz. for me. If your son is having any of that activity going on or smells odd odors then he's having a simple partial sz. (aura) sz. which is common in many people. Here's wishing you and your son well and May God Bless You!

Sue