Actually, by being (temporarily) excluded from DT1, then Timelord2067's exclusions should go from -12 to -11 on that basis, and therefore does affect whether they are on DT1 or not (even if a change from -12 to -11 ain't gonna change much).
Not true. Being excluded from DT1 doesn't prevent you from excluding others. Otherwise this demonstration of Timelord2067's maturity wouldn't be possible:
To prove a point, I removed my distrust to bring him back to DT1 (0) then slap him down to DT1 (-1) once again.