I stuck to my outline the one time I made one.
I would elaborate but that's really all there is to say. I don't outline anymore, obviously. I don't see the point in outlining if I'm not going to stick to it pretty closely--hence why I don't bother anymore!
As for wanting something to happen by a certain page, that mystifies me, since I have no clue how many pages anything of mine will have, even WITH an outline. I'm surprised that one can write so strictly. Perhaps I might expect something to happen by a certain
chapter (if I have a strict outline, that is), but as for page...? No clue. I guess my writing process is much, much different.
I do know that in my current WIP, I had a character who at the beginning I wanted to appear in the story...then I started getting well into it and she didn't show up, and didn't show up, and didn't show up, so I thought, "Eh, I guess she's not coming," then all of a sudden, there she was. Just not nearly as early on as I'd expected, but now she's a major character and drives much of the subplot. The story would be nowhere without her. It's hard to believe I thought I'd go on without her.
Whereas with ANOTHER character I planned to show up, well, I'm getting close to Part 200 and she's not there, so I'm pretty sure
she's not going to be in this story. She'll have to wait for the next one.
My advice might not apply as I don't write with an outline or a word limit in mind (hence why it's easier for me to allow a character or event a lot of time to appear in my story, since it has so many chapters), but perhaps you should just keep doing what you're doing, and just see what happens? You never know, maybe it'll turn out closer to the outline than you thought (if it's meant to). I thought for sure my character was never going to arrive, but she did.