Hi Rob,
You're not using the thing right now with planeplotter by chance are you? I've seen a new sharer in the last few days that I don't recognize. Their name is GN but I don't know of its anyone on here or not.
The best luck I've had for plane ID is by googling the code for an aircraft. It will look like a hex code (IE "AE2F9A") on your display. Often callsigns can change or be reused among plane types, for example everything from a C-5 KC-135, C-130 or a C-17 can use Reach (###) as a callsign, so the hex is more exact. You'll have to add plane to the google search since letter/number code is, among other things, a color code and you'll just get colors as results.
As for refueling over NS, it's pretty common for them to be up this way, I've always taken it to be because its close enough to the US but not so far away that it is a good meet up point for returning planes and a good send off point for gas if they're going to Europe. Just an assumption but at any rate this is a good place to be a plane nerd