Change the view to Perspective, rotate the view around, and
you’ll see that those vertices need to be moved over closer to the
middle of the face.
Switch to the Front viewport and move those vertices so they line
up better with the guide.
98PartII/Modeling
FYI: ROTATING AROUND A SELECTION SETRemember
that when rotating in view, Zoom Extents Selectedworks on
sub-objects as well as objects. For example, if you select a
face in the Perspective viewport and hit Zoom Extents Selected,
the view will center and rotate around that selected face.
Same goes ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.