Since you ran the CM11A prior do you have your other transceivers configured in AHP correctly?
Set as RF transceivers not appliance modules?
What is the trigger your using for your macros?
Are All your house codes set as transceiver except for those with a transceiver on them?
Are the macros your trying to run sending commands to another transceiver?
Lots of questions But I'm trying to picture your setup!
Settings for RF is found in the Hardware configuration remove all housecodes from the transceiver codes window!
You may need to add a send RF signal in you macro if it is sending info to a transceiver as some only receive RF and transmit back on the Power line!
There are lots of things you can try perhaps someone else who converted from a CM11A to the CM15A will jump in. Many can get by with out the added transceivers required for the Cm11A. Since the CM15A is a all house code transceiver you may be getting signal collisions among other things!