Hi @MrSaxompahone
Quantizing refers only to the Notated Duration (what Dorico writes as rhythm). You also have a Played Duration (what you hear as playback) that, when you record Midi live instead of step-inputting, can be different from the Notated Duration defined through Quantize (you can switch the visibility of both in the Key editor):
Now to your specific request:
Try this:
Select all music in the drum part, menu Play and click on Reset Playback Overrides.
Some more information here:
Here an example of before and after Resetting Playback Overrides. You can see the results and also manually adjust the played lengths of the notes if you switch the Played duration view in the Key editor:
before:
after:
