Few days ago, did an oil change for winter, on my 95 neon. I used a NAPA proselect 21348 filter, and had NAPA conventional 5w30 in thier. SO! Hacked it open, too see how it performed. The top part of the media going around the filter media, was sagging! Noticebly collasped ratther. Ive cut open many differnt kinds of filters, and never saw this before. What does it mean?