Hiya
(((Hugs)))
Just looking through your routine I have a couple of thoughts ...
1) The first A time of the day seems a bit too long for him. If he is up at 7am and not sleeping until 9am that gives him an A time of 2 hours. At 11 weeks I think he should probably be up for about 1.5 hours max, some mums find that their LO's can tolerate even less A time for the first cycle of the day. I would aim to have him in bed and sleeping by 830am if he is up at 7am. Even if he won't eat until 8am I would still aim for an 830am sleep. Does he take long to feed?
2) What EASY are you on/aiming for? The A times are all a bit different over the course of the day, but I realise that the short naps are throwing EASY a bit. If you are aiming for a 3 hour EASY you would probably be looking for 1.5 hours A time and 1.5 hour naps. I notice that sometimes his A time is 2 hours ... is that because he is up early from a nap and you are trying to keep to the 3 hour schedule?
Can he handle 1.5 hours of A time? If so I think you should go for 1.5 hours activity, including feed and wind down and aim to have him asleep 1.5 hours after waking up. Of course, if he wakes early from a nap and you are unable to extend his sleep (through pat/sh or AP) then you should do a feed, low key A, and then bring the next nap forward, so maybe he will only be up for 50 mins-1 hour. 20 minute naps are not restorative so he will still be really tired after waking up. You need to get him back to bed to stop the overtired cycle building up.
3) I would aim for him to have a 12 hour day and a 12 hour night. So if he is awake at 7am then aim to have him sleeping by 7pm. It might just been that you have to bring bedtime forward a little from what it usually is.
4) Does he go to sleep independently? What is the routine? How do you try to extend the naps?
Michelle wondered whether you swaddle him and if you have a good wind down routine? If not, I think these are things that you should definitely consider. Waking at 20 mins may mean that he is waking at the jolts, swaddling will help him make it through this point. A good wind down routine will help him realise that it is nap time and he will come to recognise this, and relax ready for sleep. If you don't have a wind down routine we can give you some ideas.
If he is having night wakings it could be due to the fact that he is overtired during the day. Hopefully once you get the naps sorted out the nights will balance out a bit.
Please post back with qu's. Hang in there you will get it sorted out