First of all, congrats!
It is strange though, they started SS 3 months after CV request...Gees...what were they doing with all those time? I thought they would immediately start SS after receiving the CV.
Well, you can raise CSE to confirm whether they have received your WES report. Other than that, there isn't much you can do except waiting patiently.
Good luck.
1. about 3 weeks
2. no
3. 7/6/2018 AOR - 7/25/2018 IP1 - 8/15/2018 MEP(if I remember correctly) - 11/20/2018 IP2
4. No I haven't got my PPR yet, I am currently under SS so...