So if the joining user is on channel #vanman, they are NOT to be kicked? If so, then...

you should change this
if (#vanman isin $3-) &&& (%cc.whois != statsbot) (%cc.whois != SilentAngel) {

to this
if ((#vanman !isin $3-) && (%cc.whois != statsbot) && (%cc.whois != SilentAngel)) {