As far as I know; the DT system rotates from DT1 to DT2, and if someone remains in 1 maybe next 7 days he could be in 2.
Theymos shuffle DT1 every month with few people in DT2.
He also make himself to be in DT2 but later make himself to be in DT1 as he is shuffling it every month. I am DT1 now, but I can be removed in any month but likely later be in DT1 again in another month.
At least, DT1 members will know this so that if they see themselves in DT2, the should not think that they are demoted, they can also still be in DT1 again as theymos shuffles it again the following month or the next.
I hope Rashlyowl should be satisfied with this answer.