Did the metal backing, as well as media, pull out of the end cap easily? What's the date on it? Not recent, I hope!
This is at least the 3rd report on BitOG of serious problems with the XG10358. Also, as of two or three years ago, most of the ones I looked at in Walmarts had absurdly uneven pleat spacing. There's no point in including the theoretically optimum number of pleats, if half of them are crammed tightly together in only a third of the circumference. However, the ones I've seen more recently look OK in that regard, and so does the one in this thread.
That's in contrast to the Chinese TG10358. All of them I've seen look beautiful, and the one I bought was trouble-free for 25.8k miles of use.