Speed Test to Cox Servers Around the Country - Consistently Inconsistent

Our church has been Live Streaming for over a year.  We have upgraded to 200 x 20 Mbps service, but when I run the Cox Speed test to our Cox local server (Norfolk, VA), it shows we are getting about 185 - 195 x <10 Mbps.  Upload is our concern for our Live Streaming.

The confusing issue is when I run the speed test to other Cox servers, i.e., Providence (RI), Atlanta, New Orleans, Baton Rouge, or Las Vegas, I get comparable download speeds, but also the full 20 Mbps upload.  That tells me the problem is not our internal church network or equipment.  Interestingly, running the Cox test against Cox servers in  Fairfax (VA), Oklahoma City, Omaha, Wichita, Phoenix, San Diego, and Orange Country (CA), again gives me comparable download speeds, but just half +/- on the upload.

The Cox technicians who have been out say their meter shows 200 x 20 Mbps at the modem, but they can't explain why all Cox servers show appropriate downloads while some are showing uploads at very slow speeds.  And it is consistently the same servers which are high and which are low.  The techs are blaming the Cox sped test.

This just seems odd.  Does anyone have any ideas?  And how do we know what is right?  Or how do we get it fixed?

TIA

Bill