Assigning Devices to preset (EQ)

[RachelCM]

I have assigned a couple Bluetooth devices to certain EQ settings to get the best possible sound from them, however I have some Echo devices, plus Bluetooth headphones that don't show up as assignable and none of my preexisting presets sound good on them so I have to manually assign a preset every time I connect them. 

Is there a limit on the number of paired Bluetooth devices Poweramp will let you assign presets to? I don't see my echo devices or headphones at all within the app. I currently have 3 with individual presets for different Bluetooth devices, one of which is my car kit, but have 6 Bluetooth devices my phone connects to. It would be nice if Poweramp assigned a preset EQ automatically for each device so I didn't have to change it every time I connect to something new.

Thanks

Rachel