Add keyframes to where there aren't any!

Those are the same properties you can change in the effect controls panel - ordinary position, scale,rotation - those don't count, and what about tracking, keying, shadow, stroke I pointed out in the first message? And if you toglle the stopwatch next to the Source text the hold keyrames only fork changing the function on\off only

Notice the icons on the EGP for many of the positioning controls? In the Align and Transform section especially?

They're gray, the numbers blue, right? Ever tried clicking on the icons?

Neil, EGP has no ability to animate anithing at all except cases when keyframing was embeded into a mogrt file in AE where it had been created. Think you should know that. And what I am talking here is simple texts created in Premiere Pro.

Did you check in the ECP? When  you have mogrt items selected, you can most of the time go to the ECP to animate them. That's ... by design, it seems.