Thule 422XT XK1 adapter Installation question

Am I installing this properly on my 2012?
The way I have it the clamp portion of the adapter essentially clamps onto the bottom rail of the track.
Is that right?
when I tighten it down it pulls the whole base towards the inside of the bed. (i dont have the uprights in yet) but it pulls it in maybe at a 20degree angle.
doesnt seem right...
any tricks or tips?

 

i took some pics of mine-hope this helps.

 

I'm having the same issue. Maybe the bed changed on the 2012? I thought the were supposedly no changes from the dashboard back.

 

I am attaching some photos of my install & what I had to do to make it fit...
On the bottom of my 4 base uprights were thesse black pieces of rubber with a built in molded "lip" - I'm assuming for cushion on the bed rails.
Well, I had to remove all of the black rubber to reveal a nice clean, flat piece of aluminum.
After I did that - they set on the bedrail and attached to the track via the XK1 adapter perfectly.
Like someone else said - they have a very particular fit.
If it dosent seem right, its probably not...
Once you get it these racks are awesome!
I've only carried a small load of lumber up there but it was solid as could be.

 

I had the same problem while trying to install the racks on my 2015 Tacoma. I bought them for my 2008 and they worked fine but when I installed them on my new truck they tilted in and was near impossible to put in the uprights. I called the dealer where I bought them and was told I had to buy a whole new rack system since Toyota had probably modified the rail system. I went ahead and removed the rubber gaskets like Rotorpilot suggested and they straightened right up and now the uprights just glide in like they are suppose to! Thanks for advice!

 

Does anyone, by any chance have these adapters available for sale?!? Thanks