Some questions first-
What are the existing PIXEL dimensions of the image you want to print?
Are you sending the image to a Lab for printing, or your own connected printer?
What are the Width & Height dimensions you want to print? 19inch x ?
Here's the answer to my question and it includes an important takeaway. I updated LR this morning five hour before the crazies. After updating, I opened LR from the dock not the CC "Open" button. This is a mistake.
I spoke with Adobe support. At first the support guy was mystified. Using screen sharing he verified my problem. He decided to try re-setting LR Preferences. That worked. Together we were able to successfully export my file to my normal specifications including size and resolution. Problem solved.
Here's the takeaway. After updating to the latest version, always restart LR with CC "Open" button. Apparently LR uses that button to initiate a series of synchronizations between your old version and the new updated version. If those synchronizations do not occur, anomalies can occur as in the CRAZIES take over.
Pleased you have your answer.
I have just read another forum where a user was opening Lr4 from a desktop icon (with CC2015.8 installed)
If you delete the dock icon and create a new one from the Lightroom application, it should operate the same as using the [Open] button in the CC App.
I have to do a refresh of my Windows Taskbar icon every time Lr updates. (and it works)