I can sometimes see Oldry's fleets when you/Vellos has a ship nearby (the one that had a lot of Cruisers on, I forget the name), but then sometimes I can't even when you have someone nearby/on the planet.
What browser are you using? Could just be a draw order issue for the browser messing things up.
Hmmm, it shouldn't be a draw order issue, the sensor rings are drawn with alpha, so you should be able to see both rings. Hmmmm...
I wrote quite a few tests to make sure this worked properly, but weird things can happen. Just to make sure what's going on -- if the 2 fleets aren't moving, does the Oldry fleet show up on some turns, but not others, or? And it's fleets seen by a friendly power, not your own fleets, right?