Just be mindful when you allocate seating online with Jetstar that when you book seats 'going out' be sure you book your seats for your return flight.
We bought our seats back in July during the big introduction sale and since then we have had a few flight time changes.
Away, tonight I decided to check verbally with Jetstar as our new documentation wasn't showing our seats numbers at all... only to be told that our return seats numbers were NEVER booked. Luckily they were still free which makes me think others may have made the same error.
I really don't care where I sit as long as I sit with my husband as I am a terrified flyer. However, given the option I would prefer the two seats together (window and isle) and not the 4 across the middle.
Hope this helps.
Cheers Geri