My devices change value without my interference

[scatman]

Hi
I have RPi2 + RFXcom. I use switche Home Easy for my Christmas tree - product: http://www.homeeasy.eu/RemoteControlled ... oduct/938/
I use too another devices HomeEasy. For example Remote Control Indoor PIR.
I have events end schedules. I have problem becouse my devices for example Christmas tree device change value without my interference?
Do you know what is that?