After being in fourth position for more than a year, our e-commerce site rankings took a dive around the beginning of May of this year.
Our catalog pages started disappearing from Google's index, and on top of that, Google seems to be showing wrong cached page for many of our previously highly-ranking catalog pages.
Here are a few examples, where Google apparently stores the exact same "New Arrivals" category page in its cache, regardless of the actual URL:
…and many more.
What am I missing here?