nonqualified pension income and IRS not recognizing their revised reporting requiements

TurboTax properly reported my nonqualified pension income on Form 1040 Schedule 1 Line 8t per IRS' own requirements given on Page 24 of IRS Form 1040 Instructions.  However, I received a CP-11 stating that I was mistaken in reporting my income from my W-2 (which is where my nonqualified pension income is reported in Box 11).  I called the number given on the CP-11 but 3 IRS folks could not help me even as I walked them through the IRS requirements.  Per their recommendations I sent a detailed explanation along with documents to the Kansas City office showing that my nonqualified pension income was properly reported on Schedule 1 and hence on Line 8 of Form 1040; please correct the IRS mistake.  Two weeks later I received a CP 503 with threats to pay up or IRS would consider a levy of my property.  Per the instructions for the number given, I talked to 3 different IRS personnel none of whom could help me.  All researched the IRS instructions I referred them to and all give various reasons why it was outside their narrow preview of analysis to help me; the last of which told me I was on my own and hung up.  Has anyone else encountered this difficulty with the IRS?  I would have been nice if TurboTax had cautioned us that a simple change in IRS forms might present a problem for the IRS and that a short note explaining the change should have been included in our tax return.