I will look into why the devices where not added correctly when you tried the pushbutton method.
The reason polling does not work for the manually added devices is that there is no Insteon link made between the device and the EZSrve.
Can you do the following?
Remove one of the devices you added manually.
Open up the utility, logon, and go to the EZBridge control page.
Go to the web page and try to add the device using the pushbutton method.
Can you copy and send me whatever traffic is seen on the received panel?