So...Live doesn't send MIDI note off?

[Macrostructure]

To answer your question, it would be possible for a midi note to contain a on command and a duration to convey the note info, instead of a note off at the end.

OK, how the hell can MIDI see into the future and know when a note will end?

Not to mention there is no room in the MIDI message to hold duration information

I am at risk of repeating myself....