Cubase 8.5 Pro. Track lanes misbehaving

Howdy Folks,
I’m having a ongoing weird issue with track lanes in Cubase 8.5 Pro. After recording multiple takes only the last take will play back. All takes are visible, but I can chose/highlight/hear only the last take. No earlier takes will come forward, so it’s impossible to edit/comp parts. I’ve resorted to opening my C8.5 projects in C6. Lanes work as expected in C6 - I can highlight/listen to all takes and have zero issues editing & comping. The comped parts then show up accurately when I reopen the projects in C8.5, but can’t be edited or changed. I’ve looked through the literature repeatedly, searched the forums and sorted through settings, but have been unable to find anything helpful. Ideas? Is there an extra keystroke beyond simple cursor/click selection? A basic setting I’m missing??
Thanks… Davo2296