Instruct: Classify Amazon reviews into positive or negative sentiment
Query: What's going on?

I note that as of 04/17/2011 Amazon are running low of both part 1 and 2 of Season 6 and Season 1 on Blu Ray. Every fan of the Blu Ray versions knows it is crazy why 2-5 seasons have not come out and there is no mention of them on advance release listings for the whole of 2011. I put it to all you, why would Amazon allow a low stock run of such a significant title???