When I experienced this issue, I went through the Target directory and made all the .exe in there "run as admin". I hope it helps you as well. What I have noticed, that on occasions, both the combined device and the individual devices will still show in the devices window. It shouldn't prevent your title from seeing the right one, however you may need to clear the commands from the unwarranted device within DCS and/or other sims.
Windows is trying to protect you from what they think you don't know, so it halts the running of the combining process. Even if you are the admin on the pc.