around Pesach I check everything.
There are things in Osher Ad with a price in front of the shelf labeling them Badatz, but the product itself says the Badatz is not for Pesach. I think the workers made a mistake (the hechsher at the front is supposed to be the Pesach one), but as I said, I check every package before Pesach.
Agav, Rabbi Gross's matzah seems to have acquired some extra hechsherim this year. I don't recall KSH last year... (I usually buy a kilo and sell it for Pesach - then eat it on Pesach Sheni. It is very tasty and cheap for hand matzah.)