If you look on the first image, this is the actual production file. The legend has the colors in order, the base white being first. I split the red and put the mixing red first and the solid red near the end. This is not always how they set it's up on the press, but the mixing red was the first color printed after the base.
You know that is interesting I was looking at the red, your print order and doing some analysis. A couple things I noticed...
Looking at the original to the channel separation to the print. In my analysis I was able identify that your red to yellow blends were reasonably accurate. Yet the red in the suns reflections in the water in the print was over powering the blend and also the yellow in the fish were more of gold color than a yellow color.
I believe this is because the red stepped on the yellow and blew out the blends. Typically a result of fallowing the same dot same angle halftone printing recommended by so many people in the Industry, Including the RIP manufactures and distributors.
Then what happens is the printers think.. Well its dot gain lets adjust the pressure. And that can elevate some of the issue, but then the print may get compromised in some other area of the blending or in vibrancy.
These are one of the areas we have done allot of looking into as we have seen the struggles so many have on press.
If you look at the dot on dot hue image which is a simulation of the red on top of the yellow hue blend in halftones you can see the red then over powers the blend. Thus in the original and separation the red and yellow blend in the suns refection towards the front of the boat. But in the print the reflection as well as the yellow in the fins of the fish have been compromised.
Not sure how you ripped the halftones. I could be wrong because we are dealing with a digital photo of the final print which might not represent the color very accurately. I was just curious about my perceived issues with the red and yellow in the print so I made some analysis.
Hope I am not intruding here. Just some friendly analysis. And I cannot tell how much I appreciate you posting these images. Most pro separators freak out when you ask for before and after.