binding troubles

[Sunstateflier]

For many years I have been using XPS receivers with XPS modules in Multiplex 3030 and 4000 series without a problem.To back up these ageing radios I purchased a Radiomaster Max edition so I could use an XPS  JR module and continue to use my XPS gear if these old radios ever failed.However,I am having trouble binding the modules to the receivers. One of the modules I purchased when the new batch became available recently and the other two came from an aeromodler in South Africa.(Iam not sure which is whitch now as I cant tell them apart) I have been able to bind one 10 chanel receiver to the radio but it wont always hold the bind when I turn it off,also the first chanel produces a third elevator chanel instead of an aileron. If I shift the chanels from 8 or 10 to chanels 2 to 9 I can sometimes get 8 working chanels.I have purchased the XPS gear over many years with only one return for upgrade quite some years ago,also I have not yet tried to bind any of the diversity receivers .Iam using the ppm setting on the Radiomaster with preset settings on delay and frame. I have not downloaded any new software to the radio,its only one week old. Any help would be greatly appreciated.