My advice was a mix of numerous past experiences with girls in similar situations.
If you're discrediting that, then you may aswell discredit everybody's advice on this forum. Unless we're all approaching the same girl in exactly the same place at exactly the same time, the situations and problems are always going to be a little different.
And, your advice was also a what you would of done in the moment too. Have you been in a college classroom with a girl who sat behind you one day but then started to sit in front of you, asked for her number, she put just a name in but no number and you were going to see her a few days later and she was probably going to be sat in front of you again?
What made you think you could tell him to just leave it without giving it a go if you haven't been in that EXACT situation either? if you have, was it the same girl? obviously not
In fact... I'm guessing the only similarity that you've experienced is the fake number thing. Here's the thing...
Nowhere in OP's post was there a rejection or a fake number, it was a name with nothing else. You don't know if it was fake, you don't know if it was a rejection, you don't know what her intentions were. You just assume it was a rejection.
It's very likely it was a rejection if OP is an ugly fuck with no calibration, but that information we didn't know yet. It could of also been a number of the reasons I pointed out in my initial post.
That' why I advised for him to just ask her normally... what's the worse that could happen?
I then gave a few ways he could possibly get her interested in him after that based on the possible reactions. Which were legit, even your last post alluded to a similar principle.
There was so much that OP initially did wrong. He went for the number too quickly, he didn't even really get to know her first, he was fretting about it when he made this post and wasn't confident, he didn't check the details straight away, and I'm guessing he doesn't have the other 95% of game down that isn't to do with the approach or taking numbers, it was a lame pick up and this could of been prevented...
The reason I haven't been in this situation is because I'm not shit enough to have gotten into it in the first place. But... girls with-holding numbers but then getting it again at another time, yeah, girls not returning a text, seeing them again and handling it from there, yeah, girls not giving me numbers because their boyfriends are coming to pick them up and they're in serious relationships but bumping into them a few months later and still keeping it alive, yeah.
If I just accepted rejection with all of these scenarios, I never would of followed up on them...
"defeat is just a state of mind, no one is ever defeated until defeat has been accepted as a reality"
OP's scenario just isn't really that tough of a situation, she's sat in front of him two times a week for christs sake

You can say I haven't been in the exact one, but if I've been sat behind girls and pulled them before, and tackled many similar situations, I at least have the credentials to offer a few lines of advice.
Let's just put it this way...
- You would of left it, that's fine if you never want to stretch yourself and figure out new things.
- I would of gone for it, I would try something the next time I see her, because from what OP described, it is far from fully over, this would just be the beginning of the seduction in my eyes. If I failed I would analyse and learn from my mistakes for a similar situation again.
It's fine for me that you would of left it. When I made my first comment I was only responding to OP, alls I'm doing now is defending what I had to say... so have you actually tried something like I recommended before?