Well, thank you, but that error was the result of a quick rephrasing. I modified one aspect of the sentence to maintain parallelism between the two gerunds with

Well, thank you, but that error was the result of a quick rephrasing. I modified one aspect of the sentence to maintain parallelism between the two gerunds without making sure it still made grammatical sense. I should have removed the article. I'm more diligent in a professional context than I am in off-the-cuff HN comments. (To return the favour, "a is predominently singulair, it is grating to see it in collocation..." includes a comma splice and a misspelling — singulair.)