I figured it out!!! So I am pressing my seams open and then lining them up and holding them in the same spot while putting the fork pin on either side of the seam at 1/4 inch from the raw edge where I will be stitching my seam allowance. The rounded connected end of the pin is on the raw edge side like in this link:
http://quiltsbyjen.ca/technique-tues...or-not-to-pin/
Finally my seams are lining up!