Jim,
Quick response: Checked your spreadsheet numbers against the pricing tool and my build sheet (ordered August 2018, delivered February 2019). I match all your numbers except the cabinet behind passenger seat--MSRP on my build was $866 vice the $788 you show as "old" price. All other "old" prices correspond on my build. I'm not aware of an "advertised" price increase since my order, so I must assume that the price tool increases that you document are "incremental" increases that occur over time. I haven't attempted to research Phoenix's past process for raising prices--I was aware of the pretty much across-the-board 15% (or so) increase that occurred not too long before I ordered (along with the reduction in discount from MSRP from the previous 26% to the current 20%). The combination of those two increases resulted in a substantial bump between units bought in 2017 versus late 2018--I had to swallow pretty hard to accept the fact that if I had ordered a year or less earlier I could have bought for 20%+ less---a really major dollar amount--but my timing was what it was.
While I wasn't aware of the increases you document (have had no occasion to look at pricing), we all certainly know that prices inevitably increase (they virtually never go down). I've certainly had no occasion to look at competitive pricing, but I'm virtually sure that it has increased as well. I was not happy to have to pay over 20% more for a Phoenix unit than I could have got approximately a year previous--but I didn't buy it a year previous, so it was a moot point. The decision was whether to go ahead and buy when I did or not, and I decided to do so. I'm satisfied with that decision.
Regarding communication with the company---in my opinion you should always remember that you are a (potential) customer, and as such you deserve reasonable answers to reasonable questions. It is obvious that your approach to a purchase is very careful and very detailed--but a Phoenix RV is not a small purchase, and you have every right to get their best answer to questions you have. It may be that on less common options they may need to revisit pricing and might not have the adjustments on the tip of their tongue. If that's the case, work with ballpark costs. I didn't know the exact final price of my unit until shortly before delivery; that last 1% of total cost can be nebulous. My experience, however, is that Phoenix was fair in any adjustment they needed to make, and didn't take advantage of the situation to balloon anything. I told them what I needed; they did it; and added the cost to the bill. I'm sure they do get a lot of "tire kickers" that take up time and don't ultimately result in sales, but that's the nature of direct sales--it has been their decision to pursue that approach and a definite percentage of inquiries will turn into buyers. Once you reach the point of actually placing an order and making a deposit, the leverage is yours to make adjustments and refine your build the way you want it.
I still think that pricing on the sofa/slide is in error--no way they are now going to ask you to pay $4300 more for a sofa/slide than for a dinette/slide. I believe your phone call to Phoenix will resolve that issue.
All the best, Mike