That document is about 9 years old and out of date. When Mercon V first came out, it was a completely different fluid from regular Mercon and the two were not interchangable. Then Ford realized it was redundant to have two different fluids when they could just use one fluid for all transmissions, so they reformulated Mercon V to make it backwards-compatible with regular Mercon.
Regular Mercon is an obsolete spec that Ford no longer licenses or recognizes. Ford says Mercon V now completely supercedes regular Mercon.
http://www.aa1car.com/library/ford_tsb_06144.pdf
Notice how this document says:
This article supersedes TSB 01-15-7 (the document you posted)
to update the vehicle application chart.