My PS3 routinely fails to power off via macro as well... and that's with a wiiiiide range of adapters. It usually happens when I switch away from the PS3 at the same time. I think HDMI sync is lost, which causes it to pause and miss a command or two. Not really sure.

Bluetooth syncing is more-or-less a completely static system, so if you're having issues there I would more blame the PS3 than the adapter - the adapter doesn't change anything. I have seen where the PS3 starts ignoring BD remote codes for 20 or so seconds (even the original Sony remote), but I don't think I've seen it completely stop working. I've also never seen the remote lock up the PS3.

The pairing limitation is due to Sony.