AC not blowing 100%

I have a 2009 tacoma and the AC IS cooling and blowing on all 4 speeds. However it isn't blowing 100% , my dad has an 08 and his blows almost twice as much air. I have replaced the cabin air filter and it did not help. I also noticed when I removed the Cabin air filter itself the AC blew the way it should. I am thinking it is some blockage along the filter/s .
Is there any other filters or maybe a coil I should take out and clean?
It driving me nuts with this south Texas
blaze!!
Thanks fellas

 

It might be due to installing the new filter upside down etc.. Watch this video.

http://www.carcarekiosk.com/video/2..._Cab_Pickup_(4_Door)/air_filter_cabin/replace

 

Filter is installed correctly. Any other ideas? Thanks grill master

 

Anything inside the basket? I found leaves in mine.

 

Any chance a HVAC door is sticking, and air is coming out at the floor or defrost outlets?