Hey there hun, and welcome to the boards:)
How long have you been trying EASY, looks like you've also read Tracy's books. At 18 weeks, I would really be aiming for something closed to a 4 hr EASY, so having feeds every 03.30~04.00 hrs, with an A time of around 01.45~02.00 hrs, as some of the A times above were relatively low.
As for those frequent NWs, they're probably due to OT at bedtime, so even if your lo can do 01.45~02.00 hrs of A during the day, the last A time would be no more than 01.30 hrs. The OT may be cause by several UT naps leading to OT by end of the day.
Here's a link about sample routines at this age, might give you ideas:
http://babywhispererforums.com/index.php?topic=164029.0HTH