Low/High Season Tickets?

[RoosMomKanga]

I'm still trying to figure out purchasing tickets in advance and I ran across many tickets sellers who are selling the tickets as low or high season tickets with different rates. Does Disney sell different seasonal rates or is this just the ticket brokers? The reason I'm asking is because many brokers have their low season expiring April 4, and the Disney ticket site is offering ticket rates through April 4. So confused....

 

[A Small World]

AS far as I know the tickets arent sold as high/low season. Its the rooms/packages where teh prices change according to season