Hi KitCat,
Just thinking about you and my LO. It seems that my son has been pretty OT and falling asleep while nursing... don't know why I hadn't put that into perspective. However I wanted to share my thoughts with you and what I tried today.
At his 1st wake up at 6:00, I fed 30 min and changed in dark and right back to bed. Awake to sleep pretty happy guy! (Total of maybe 45 min awake) (Generally I would have let him get up and start the day) He slept for 2 hours. He woke around 9:00 and I fed for 30 min, changed, calm play time for about 10 min then noticed he was burring his head in my chest. (50 min awake time) I took him straight upstairs and laid him on tummy and within 5 min he was out. (All on his own no fussing!) He's now been sleeping for 2 hours! He woke at 1 hour stirred but no crying and settled right back down. (I just watched) SO my guess at least for my little one and possibly yours is that shortening the A time would be better. Also watching out for over stimulation and overtired. Getting them to sleep before they're fussing/crying may make all the difference! However, we have a dr appt and I'll be waking him in a few to leave so the rest of the day will be messy...but I'll try again tomorrow when we're home!
Hope this helps you! =)