This is what I found out and verified. The message/record key is very sensitive and the instructions of tap and hold for one second is very exacting. When you are recording your initial message you first HOLD the record button for 1/2 second(and they mean 1/2 second, not 1 second or a quarter of a second). Then hit the 1-3 place where you want the message stored(how long you tap that button is irrelevant). Add your message and when finished TAP the message button(tap, don’t linger on that button and make sure you tap less than 1/2 second). If you do all of the above, it works.
I am now an expert on adding messages on my KX2. If you want to erase a message make sure you follow the TAP and HOLD instructions exactly. If you do you won’t have any difficulties. Everything will work perfectly.
Thanks for reading. Keep safe and 73, Mike.