?? on many older editors there is a "Match Audio to Video Length" option ?? today that option is not needed -- unless your computer is slower than a Laptop!
Editing requires a lot of internal commands:
1) get the Image.
2) mark the location.
3) get the Audio section.
4) mark the location.
????? repeat as needed.
?? the problem with that is your computers ability to divide the Audio into proper sections.
( That problem was solved when editors started using API-Calls in the programs. Win98 )
(( That problem re-appeared when Windows moved everything back to non-API programming. WinNT))
((( problem solved by using Real-Time Editors

)))
WMM and WMM2 are NOT real-time editors; as such, you will need to match the Audio to the Video my magic
[ don't ask, we haven't figured it out either! ]