Total silence

Hi is there any way to get total silence to work better with the slider ? My phone is coming out of silence with the slider all the way up.. and that's not what I want. I think it should be silent no matter what when the slider is positioned properly. Or is this one of the bugs that will have to be worked out

I am using cm 13

from xda-developers http://ift.tt/2aEVEbm
via IFTTT