This segment, I believe will pull back ALL pages following the sequence, not just the immediate page after Page B.
If you look at the sequence built by the "Next Item" panel, they have additional logic to exclude the remaining pages.
HITS [
HIT Container [
Page (non-repeating instance) exists
]
AND
VISIT Container (Only After Sequence) [
HIT [
Page (non-repeating instance) equals Page A
]
THEN Within 1 Page View
HIT [
Page (non-repeating instance) exists
]
THEN
HIT Exclusion [
Page (non-repeating instance) exists
]
]
]
This segment looks for the next page after Page A... in your case, you want Page A > Page B > Page ?
I would try to add Page B into the sequence here and see if that gets you closer to what you need, as opposed to all pages after the sequence.
Good Luck! Let us know if you are successful.