Diagramming Might Do Wonders

"not only do using organic principles improve the quantity, it also improves..."  Can you belEEEEVE that verb "do"????  The idiot who penned this sentence mistook "principles" as the subject, when in fact "using" is the subject.  I just can not get over the utter stupidity (or the fact that there's no qualified editor red-inking the ridiculous mistakes).