Well, here it is, August and it seems this is still an issue, not a bug that will hopefully get fixed. I also had it happen to my level 47 Sorc last night. I was expecting a message that would send me to Korriban about my apprentice, and clicked on the Holo only to find I was in a Makeb cut scene. I didn't expect to get a Makeb quest before I was 50, let alone before I finished my story so I didn't Esc out of it in time to stop it. Granted, I had already /assumed/ what my part of story conclusion would be, but now its going to be a little anticlimactic, knowing that thus/such will definitely happen, and the other thing that happens won't be a surprise at all.
If this is Chapter 4, why does Bio allow it to start before the end of Chapter 3? That just seems sloppy to me.