kulprit, the real C is still Ndure'd ... no softmod can be booted directly with the Power or Eject button when the real C is totally retail.
I understand your UDDAE circumstance now ... UDDAE is installed for the real C's MS dash usage (such as via the Eject boot the steps installed) but you're launching the virtual C's MS dash instead, which results in MS's "credits easter egg" for the button combo.
It can also be installed in the virtual C, if you want to see it work that way, by launching /E/ndts/unleashx.xbe (not default.xbe), doing step 5 and then invoking it the way you are...