Does Cat say it shouldn't be side loaded in writing in the TC only or is that written in the operators manual somewhere? If that information is not in the operators manual somewhere and just recently came out in a technical communication, I think that is " the easy out" button of that machine. You certainly would not have bought it, having known that information. I can't believe anyone would pay that kind of money for a big azz machine knowing that side loading causes the arms to hit the steps. Of course, no one wants to make a habit of side loading, kinda like backfilling or moving material with an excavator with the side of the bucket while swinging. Sometimes you have to do it.
As we have seen in this thread, Cats specs are "loose" to say the least, offering the most latitude possible. So loose that it would make the machine unworkable for tight grading work if your machine is built on the far end of the loose scale. Stating you can't side load the machine is equally as unbelievable as their build specs for loader arm tolerance.
I really suggest demoing a DL550 Minitour. I run a GPS system on a GB128 Sharp Grade grader attachment pushes a full blade with ease. The machine is super heavily built (it weighs around 18K). Demo it, if it aint your gig so be it, but no one needs to be saddled with a machine that can have 1" variance in the bucket level, or a machine you cant side load. I am really surprised CAT is having these issues with this machine, and I am equally surprised they are not addressing it. Software issues or something similar I can get, but these build quality issues, that surprises me.