If the 2000T is like the Fox-T2, the Lefthand number indicates the start time of the timeslip buffer, the Righthand number is the end time of the buffer. The Middle number is the current time associated with the picture being displayed.
When paused, you should be able to move backwards and forwards using the left and right arrow buttons on the remote control centre ring.
IIRC (I'll look the next time I have it on), the bar is always two hours long, which is the maximum buffer time. The left and right hand ends tell you the start and potential finish times of the current buffer. The coloured area of the bar ends at current time, denoting the length of time you have buffered. The little line with a time above it shows the time at which you are watching. In Luke's example the coloured bar would fill from the left hand end (the time at which buffering started) to 21:09. A little bit to the left of that will be a little line and above it the figure 21:07.