I was there last week and noticed the same thing, but then I realized it was all leftovers from the 2010 55th anniversary celebration at the park. I was able to find a few cute things that didn't mention the 55th anniversary but mentioned the 1955 opening of the park. I was there a few years ago after a Disney World anniversary and the same thing happened.
I was at the Great Lakes Crossing outlet in Michigan on Sunday and they had just got a bunch of stuff in from Disneyland as well. I picked up some candy corn ears for the halloween party this year They were only $4.99 vs $19.99 at DL!
The Disney Outlet at Gurnee Mills, IL has a section of the store dedicated to Disneyland merchandise. My family was hoping for pins, but no such luck, up to this point.
The is a company called AMS Character Warehouse which will buy up discontinued merchandise from Disney for pennies on the dollar. They will have their stores pop up for about six weeks with prices from 20% to about 85% off. Usually all they will have is Disneyland merchandise, but sometimes WDW also.
I think part of their contract with Disney is they will not do any selling in either California or Florida
I thought the store was overly crowded with Disneyland stuff when I was there a couple weeks ago. Kind of disappointed in it to say the least. I hope the Disney Store in Palisades opens soon. We have been down to that mall 3 times since February and it has been closed for renovations. It will be awhile before we get back there as I took a weekend job.
AMS Liquidation has at least 2 permanent stores in California, so there can't be anything in the contract that prevents them from having a store in CA. One of them is less than 10 miles away from DL! It's a hit and miss going there.
Usually, during the holidays, they have their floating stores in various malls/outlet stores.
The Palisades Disney store WILL reopen soon as an Imagination Park. I forget the date, but I remember it was in May, before Memorial Day. So In 3-4 weeks, watch for announcements on the opening, they usually have Disney characters appear.