Hi, Ed,
When you create the receipt and add a new Detail for your Miscellaneous Charge, click the Vendor Code dropdown that appears underneathe the Detail Type. You should be able to change this to the vendor of your choice. Or, you might create the Misc Charge with the original order and then change this field on the receipt. (Note, that I am referring to the Receipt here and not to the Invoice/Adjustment entry.)
If you turn on the 'Allow Vendor Change on Invoice' option in the Company Profile, you will be able to change the field during the Invoice/Adjustment entry.
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Regards,
Softrak Tech Support