Oh, I see, the 11PM was before YOU went to bed! (This is what happens when there isn't enough coffee here. LOL)
Wake2Sleep - really Wake To Sleep, but we often abbreviate it W2S here - means that partway through a sleep cycle that a baby might normally wake at the end of (even though you know he needs to KEEP sleeping!
), you rouse him just a little bit, just enough that he stirs in his sleep but doesn't wake. It sometimes "re-sets" the sleep cycles and can be useful for breaking a cycle of short sleeps or habitual wakings. There's probably a more detailed how-to link someplace - Mods, can you find?