Norton 360 should allow user to have a different firewall

I have a problem with the firewall built into Norton 360. I have a necessary site I must access. The firewall thinks it's dangerous and won't let me go there. I added it to the exclusion list and everything worked fine -- for about a week.  Then it decided to block access to the site again.  I added it to exclusions and the cycle repeated itself.

So -- I disabled the firewall hoping to replace it with another.  Unfortunately I can't.  It seems Norton 360 took over that setting and I can't install a different firewall!  So I'm left to depend on my router for firewall protection.

 The user should ALWAYS have the option to which firewall they prefer.

In summary:

1) Norton 360 Firewall seems to lose exclusions over time

2) The user, not Norton, should be able to decide on the firewall in use.

Other than that I love the features of Norton 360, and hope you will consider this

Thank you for your consideration.