To much kernels installed, but config gives a limit of 5

I have this:

~]# cat /etc/yum.conf|grep limit
installonly_limit=5
~]# ll /boot | grep -c vmli
8

I have 30% used space in boot, so I’m not worry yet:

/dev/sda1 1014M 303M 712M 30% /boot

I need to wait a little more, instead of do this, right?:

~]# yum install yum-utils
and clean up
~]# package-cleanup --oldkernels --count=5