I'm trying to add IP's to a brand new cpanel box. The main IP is set up, and when I try to add new IP's this is what happens:

I was assigned xx.5.44.59 for my main IP, and 64.5.36.176/30.

From what I've read, this means

64.5.36.176 -> Network IP
64.5.36.177 -> usable IP
64.5.36.178 -> usable IP
64.5.36.179 -> broadcast IP

I asked my ISP about this, and their answer was:

"Because the "secondary" ip's are being routed to a single machine with a "Primary" ip, then you don't lose the network and broadcast. "

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My problem is, WHM only adds 2 IP's instead of all 4.

Does anyone have any ideas?