I wish surgeons would specify the lengths of the different channels in their reports, but none of them seem to do this. It sounds like a real 2 anastomosis DS but with a long alimentary limb and a 100 cm common channel to me. Given your struggles with the lap band and what your surgeon repeatedly calls "extreme obesity" though he doesn't specify your bmi, it would have made more sense to me to make the AL and CC combined on the short side and then lengthen in the future if you had nutritional problems, rather than making their total longer than usual. But it does sound like a DS and not a SADI unless I missed something.
I will go back and read it again later, sometimes something I didn't spot jumps out at me on a second attempt.