I am on Bt infinity 2, and since installation a week ago i have been getting a pretty consistent 50mb download and 15mb upload, however today i noticed my hud turned orange for a while and noticed my speed had gone up to 65mb, it then happened again later on and returned to 50mb. A few hours later i decided to reboot the hub and after it had come back on i was getting 71mb, that lasted about an hour and then it dropped to around 54mb. What is happening? Are they mearly testing the line? Will i get the faster speed my line can obviously do as i was getting it?