Not sure why the second did not run, when the first finished did you see the second test swap into the position of the first one? Its not a logic fault per se as its working for others with the same ISP and same browser.
It may be the mixed mode is being blocked by some settings you have, i.e. running a HTTPS embed on a HTTP page.
As the speed tests are NOT linked to your logged in profile they will always appear as someone else's result for now.
Just ran sensibly for me from Chrome (Windows 10 laptop with wired connection) and gave the results I would expect.
The results page did say I was viewing someone else's results, but they looked exactly like mine.