The same thing happens to me, reading scroll as it does 'catching' a commercial. . .i walk in and catch the commercial at the 'same spot' I did earlier. . .can go a whole day or several. . .and only see from the 'same starting point'.
When I look down to read scroll. . .I see the same half or ending point of message. . .over and over; as I watch the news or programing.
Now THAT. .drives me crazy.
More times than not. . .if I 'start' a program say midway. . .like maybe I have missed all but the last 20 minutes of a show. . .the next time it comes around; I have missed the same 20 minutes. . .happens often with TV movies as well. . .keep missing the same parts. . .
(gives new possbilities - if only irrelevant - to that 'wisdom': what goes aroud, comes around. ;^))
Or is this some kind of variation of 'attention deficit disorder'. .. or worse?
Are you sure your TV is plugged in? < :)