Well, take a look at your code. You have the exact same event over and over, so only the first one is going to get executed.
Also, why not just do this. It's much simpler and does exactly the same thing.
on *:notice:Your vhost*:*: {
if ($nick == HostServ) {
join #botz,#my-lounge,#w4rgod,#my-training,#help
}
}