I have found Video Unlimited to be a bit weird/ flaky.
I own 6 videos on Video Unlimited (all from the promotion from buying my Z1 in december).
If I log onto the video unlimted website I can see that I own Elysium and Superbad. If I go through Media Go then I see Total Recall, Django Unchained, The Amazing Spiderman, Easy A and Superbad (Elysium appears to be missing).
On my Z1 I see Django Unchained, Elysium, Superbad and the Amzing Spiderman (missing Easy A and Total recall).
On my Tablet Z I see Superbad only.
I find it weird that Sony can not get them all to show on all devices.