GUI Port resetting to default

Hi there,
I have using CWP webpanel for about a year on Centos 7. Thanks guys you are awesome!
But I have some problem about the GUI port.
To increase security I move the http port to 47999 and https to 48999 I follow instruction from here
http://forum.centos-webpanel.com/how-to/how-to-change-cwpsrvd-listen-port-(cwp)/

It works very well. But I notice that every 3-4 month the ports keep resetting to default port 2030 and 2031
Did anybody have the same problem? and anybody know how to fix this?
Thanks a lot

/usr/local/cwpsrv/conf/cwpsrv.conf

change port in above files.

Yup,
Already did, but somehow it change back to default and I don't know why?
any idea?