Last week MDN highlighted the latest round of debt financing being offered by MarkWest Energy (see MarkWest Floats Notes Seeking $650M…or $500M…or $1.15B – Which?). We noted two announcements about debt financing–one offering $650 million in IOUs (otherwise called notes) and one for $500 million. Seems the $500 million announcement was a restatement or reiteration of a round of financing from 2014. How do we know? MarkWest yesterday said it had successfully completed closed it’s offering of $650 million…