It's ok to give it a little more time.
Usually if something is going to work for Lyle it works instantly, but that wasn't the case with cutting the nap.
(although it did work instantly for Lucy and for Helen) but, it took awhile for us.
I'm trying to find you the post on face book where everybody talk about how much sleep their LO was getting. Helen asked it about 2 weeks ago, but I don't know if FB lets us go back that far.
I am concerned about you current routine though - as we got a 45 min nap. I tried the same bedtime you did, and I got an almost 12 hour night. So my gut says it's just not working for Stan. But.... I'm not an expert to say the least about EW. I seem to be in a freakishly great round of sleep right now. That, I can't really take credit for. I figure it will last until the baby comes, because that's they way it works right, it will all hit the fan at once.
Oh, one other thing that concerns me is how much you cut his naps by.
I know on nursery days he only takes an hour or so. So those days are cut by 15 min.
However, he is taking a 1.5 hour nap, four days a week. So those days were cut in half. That's a lot.
I'm just pointing it out. I know it was recommended to you by a few people

But, we don't normally suggest that people cut naps by 1/2.
One more thing that I want to point out, I subtly mentioned it, but I'll make it more clear. Don't be afraid to try something that hasn't worked in the past, because they change so much, you never know if it will work this time.
Again. *hugs* and I hope it sorts its self out soon. I'm not offended at all. I know I would be at my wits end too. But, I hate giving conflicting advice, and that's what I'm doing. And I don't want to make you even more upset. I know it gets too hard and confusing when different people are telling you different things.

*hugs*