Thanks. I was able to confirm an issue with the code.
There exists some code to convert an anonymous configuration frame to an IEEE C37.118 configuration frame. The code creates the protocol-specific configuration frame and then copies the configuration cells and definitions over from the anonymous configuration frame to the protocol specific frame. However, it looks like the coordinate format and data formats were not being copied over, so the PMU Connection Tester has been ignoring your configuration and using the Rectangular data format with the Fixed Integer coordinate format.
I've written a fix for the issue and posted a beta version of the PMu Connection Tester with the fix. You can find it here.
With this version, if you write your hexadecimal value of 446ea721 into your data frames and switch to polar format, you should see a value of 0.9546 kV displayed in the PMU Connection Tester.