Hey Mr. Plus:
I am also experience the issue with two miners being opened.
I also experience not all miners benchmarking on the first go around. If you run the reset profit script then re-launch the miner it will then see all algos and attempt to benchmark everything you selected.
I can also confirm recieving benchmark statistics that are wildly inaccurate (IE 14 GH/s for neoscrypt). I haven't witnessed this issue on x17 or this current master release specifically but I have on neoscrypt and tribus many times on previous releases.
Win 10 rig with 8 1080TI. Nothing else special about it. Up to date.. Nvidia 390 drivers and purely used for mining.