worning about channels PPM

[ZeXx86]

This mean that you are setting up some function to other channel than ch5, ch7 or ch8.
It does not matter which receiver you will connect. This message will display always when you will try to assign it in such way.

This mean that the problem is just in the General/Channels window. You can use default channel layout and all will be fine.

[ZeXx86]

You only have to change channel layout to default. Then there will be no message. I can tell you what to change, but you have to share your settings file.