Inbound Rules to my Azure VM do not work

Hello.  I have two inbound security rules that work.  One for RDP (created when I built the VM) and one for port 80 (website traffic).  I built three more rules to allow more website traffic on ports 8081, 8082 & 8084, but they do not work.

I can verify the sites all work internally from the VM:  http://localhost/ and http://localhost:8081/default.html
I can verify this works externally:  http://40.114.10.184/
But this does NOT:  http://40.114.10.184:8081/default.html 

I've tried reprioritizing the rules, but with no success.  Swapping out the ports via VM/IIS shows me that the websites work, but any web traffic not on port 80 does not work.  I've included a screenshot below to show this.  Please let me know what I am missing.  Thanks for reading.