From 1992 to 1998, Marvel's narrative of ASM and satellite books was pretty linear:
One volume, retcons galore, sure, but generally no massive continuity screw-ups.
Despite clone sagas and societal changes, the 1962 Peter was the 1998 Peter, just grown through the Sliding Marvel Timescale.
But in 1998, vol 1 ended and - without explanation - vol 2 picked up with one of those irritating '6 month time jump' plot devices.
At the same time, John Byrne's "Chapter One" was re-creating Spidey's first year stories with subtle but important changes:
Doc Ock's origin was now tied to Spidey; Peter was blown up and hospitalized during his origin; Norman Osborn and Sandman were related, etc, etc.
Now, the Chapter One series could be seen as an 'out of canon What-If?' story if not for the fact that events therein were referenced a few times in the ASM series proper.
As fans, we can easily agree to ignore the changes - and most of us have. But the fact that the (pretty big) changes have never been addressed or reconciled has left me with this dangling thought:
What was that all about?
and... how would you explain why the modern elements were refrerred to in the ASM 1998 series?