For Three envelopes : You need to talk to Emily when she is doing her chores in the corridor early in the afternoon (twice a week), and on the "second hour when she is doing so" (as stated in the riddle)
Tnx
message in notebook still remains - must be a bug in this version 11.1 in chapter II , if winning a play Go with Susan after punishing Rachel in Susan´s room sometimes before. 
I think you ran into the case where you have two pending cases of punishing Rachel when you catch her masturbating. You used the one linked to Power Play, you need to complete the one linked to Sun Tzu #2.Tnx
Did so as you say - talked to Rachel next day - punished her in Susan´s room with strap - but the View attachment 425406 message in notebook still remains - must be a bug in this version 11.1 in chapter II , if winning a play Go with Susan after punishing Rachel in Susan´s room sometimes before.
I think there is a bug in notebook will be shown if MC plays Go with Susan again a f t e r its needed for ending Sun TZU #2 ?
For Not so Safe : Ask Emily for anal maintenance (00.00 Hot Tub), choose butt plug, and repeat until Linda shows up (occurence is quite low)
There is no particular thing to do for this last one. Repeat all possibilities in there, you should get it
Then you have to go again in Rachel's room to check on her to finish what you started by giving her the pills. Go in when she sleeps and disable the clock, the following morning report to Susan
Other possibility : you're at a stage where Susan doesn't need you. Be in the corridor at 22.00. Some days you'll hear noise coming from Rachel's room. Enter and pick the right choice. Then report to Susan the following morning
