Being made to lose unlimited data, even though I am paying full price???

Question

I've been around and have been following the discussions/policies about those of us who have unlimited data and how we will lose unlimited data if we purchase a new device taking advantage of the discount pricing. I also know the workarounds of how to keep unlimited data but what I don't understand is this....
I have 3 smartphones, all have unlimited data. 1 of the 3 phones is eligible for an upgrade, 2 of them are not.
While signed into my account, I select the phone that is eligible for an upgrade and go into the ordering system. I select the new phone I want to buy and I have the option before adding the new phone to my cart to either: pay full price, or pay the discounted price. I chose the full price option (and this is the one-time full price, not the monthly payment plan option just to be clear) and then add the new phone to my cart. That's when I get a pop-up window that says my unlimited data plan is no longer available and that I would have to chose a new (capped) data plan. Without making any new choice in this pop-up window, I close the window.  I then click through the various pages of the ordering system getting up to the point of reviewing my cart. And at the review cart/review order page, I also see that the system automatically removed my unlimited data plan and slapped on a 2gb individual (not family share) data plan.
So it would clearly seem that if an upgrade is available on a phone and even choosing to pay full price, and purposefully avoiding taking advantage of the upgrade price, the ordering system is all too eager to take that unlimited data plan away EVEN IF you chose the full price option, despite VZW's repeated statements that if you elect to pay the one-time full price you can keep your unlimited data plan. I tried seeking a clarification of this issue with an online chat representative through the chat button in the ordering process and the only solution from the chat rep was to just order the new phone and pay the full price on one of the 2 phones not currently eligible for an upgrade.
So what's your response to this VZW? I would appreciate a policy statement to these issues and this situation.

Answer 1

So I went back into the ordering system today and did the EXACT same steps I did previously by making sure I selected the one-time pay-in-full price, adding the new phone to my cart and walking the ordering system all the way up to the cart and guess what....oh low and behold.....now after posting this message, I am not getting the system prompt I was getting previously about not being able to keep my unlimited data plan (even though I was very precise in confirming my first attempt was at the one-time pay-in-full price the first time which prompted my first post).
So I guess it was just cleaner and less publicly humiliating for VZW to quietly fix their ordering system then it was to acknowledge their ordering system was forcing customers off unlimited data even when the customer was trying to pay full price in one payment for a new phone despite the Company's very public and very on the record statements that customers choosing to pay the one-time pay-in-full price would be able to keep their unlimited plan.