All have mine have done this - the round and round to lie down and the digging. As mine have all been at least 5 up to 16/17, it is not something they grow out of.
I tell them to 'stop' when they are digging their bed, my bed, the carpet or settee, which they do immediately, but they do it again at a later date. It's a doggy thing. Most of mine also try to find Australia in the back of the car - a 'stop' works straight away. Digging is not something they do every day, just now and then.
