Yes, for the last number of years on my annual visit to Disneyland I have got either a 2 day 1 park ticket or a 3 day 1 park ticket. When I had a 2 day ticket I would go to the main park on both days, and on consecutive days , for the 3 day 1 park ticket I would go to the main park on the first day, California adventures on the second day and then the main park on the third day, again all consecutive days.
For the multi day tickets you don't have to have a gap between the days, you can use them on any days, consecutive days or non consecutive days within the 13 day window, whichever suits your plans.