If the cart number placed in the ACP Imports folder doesn't have a mask in Dafie Preferences, the cart will be imported with a cart number that fits the "Default Mask". ACP comes with a Default Mask of ~??? (which can be changed) - so if they place cart M123 in the Imports folder but M??? isn't in the mask list in Dafie Preferences, the cart will be imported as ~123. Simply add M??? to "Selected Masks" and add the nodes you'd like that mask distributed to in the bottom part of the window.