etry99 where did you create preset?
try this:
After creating new preset in Media Encoder, press
cmd+s (macOS) / ctrl+s (Windows)
it will do nothing visualy, but will force export presets to be updated in the Excalibur.
Also is it possible to send the sequence to media encoder and just leave it there for later so i can export a bunch at the same time.
This is not possible at the moment, but maybe I can add this to feature requests. What is the benefit of such approach?