I have the same problem. The machine running MainConsole can add/view all 11 of our cameras at once, but Remote Live Viewer only works for me with a single camera at a time. Doesn't matter which cameras I choose - the second will only connect once I've disconnected the first. If I go to the group view and select "Connect All in the Group," it only connects the first camera. Just updated to 3.6.3 but the results are the same.
Anyone? It's not a huge deal because MainConsole is still viewing/recording all 11 cameras, but it still would be nice and obviously it's supposed to be able to view multiple at once.