That depends on what you mean by mistakes. West Gallery composers, and not only the less educated ones, used unconventional progressions such as parallel fifths and unresolved discords with some freedom. It is a matter of debate to what extent these departures from classical practice were deliberate. It is not Roding Music’s policy to “correct” such progressions unless they appear to be the result of miscopying or misprinting. Those who wish to alter them are free to do so.
However, your editor is a human being, and if you think that you have found an editing error (or indeed have any other comment on the editing) please don’t hesitate to get in touch.