not sure if this has been address, but i have 14 managed miners, but only the gpu names on the first miner shows up. All rigs have 1080 ti's (Same msi 1080 ti cards).
On some systems, you need to update the MSI Afterburner Remote Server dll-file according to the instructions in the section "Updated Remote Server DLL-file" at the bottom of this page:
http://www.awesomeminer.com/help/gpuclocking.aspx