It makes sense in theory but that’s not what’s happening:
this is what I have for the configuration I’m testing:
Handling fees 4.917355 (excl 21% tax)
Handling fees (class overrride) 5,743802 (excl 21% tax)
I’m expecting to see the class override fees of 6,95 incl tax
Your theory says 12,90 incl tax
And my shopping cart shows 6,05 incl tax