Hooker header poor design

Im not sure if this is common or not but I noticed that only the outer exhaust flanges/port on my Hooker headers is smaller than the exhaust port on the head. I had issues with sealing these ports last year and realized that the header port doesnt match up very well. The lower portion of the header port chokes off a decent amount (acting as a short wall on the lowest portion of the exhaust port). Im not sure if I am explaining this very well but has anyone had issues with this? By the looks of it, it seems that the exhaust flow would be disrupted a fair amount... any insite would be great.....good old $200 headers at their best.