You make it sound so bad......it's a very good thing.....doubling whatever EV's you get.
Just make sure you spread it quick, fast, and safeguard whatever Pokemon is infected by putting them in the PC before the day is over......a.k.a. before 12:00am.
Don't know what happened there, you want to re-do that? You had that sleeping zone, I had two layers of TS up, roserade just died and stamie had normal poison.