Squished Cabin Air Filter

[wiirenet]

My cabin filter looks like the attached.. I've had it for months, but it's very clean.. I drive every day. The fact that it's warped, is it not working well? I didn't install it, but I can't recall if it was Toyota or somewhere else.

Should I replace it?

I'm thinking about getting this http://www.amazon.com/gp/product/B00...BH9YY7Y480HJ87 and doing it myself.

I know there are cheaper ones, but I have a funky smell from my AC sometimes, so I want something with charcoal. I looked at the Fram Fresh recommended on the forum, but it doesnt actually have a scent/freshener/charcoal right?

thanks!
(oh yea, did i install it back correctly- arrow down? it also pushes out a bit and doesnt seem to fit well..)