I have been experiencing very slow, fluctuating speeds on my connection since upgrading to the 100Mb package a couple of days ago, generally from doing a speed test it is hovering between 5Mb and 20Mb and only rarely exceeds 50Mb!!. I have tried the router in modem mode and connected via ethernet and the speed also fluctuates as it does when not in modem mode. You can see the router stats below. Any ideas what the problem might be??