You're right, it does like the comma, but it's after a but, much like this sentence, and the commas are just so close together, lol. Oh well, this sentence makes sense with so many commas and so does that one.
Sometimes I don't catch things like that either and will only catch them when I go to post it on AC because it thinks everything is a spelling error, from Howie's name to actual spelling errors, lol! I like "defeatening," it sounds epic, like: The Defeatening. It obviously wouldn't make sense in context, but authors have made up many words throughout history. That's why linguistics is so fascinating.