Hi, if the seams aren't matching up, then all the squares aren't a true 9"...so take some time, stop where you are, and square them ALL up to be what you chose...the 9"....and pin and sew same size seams, as close to 1/4" as you can get, but be consistant with every seam being same size...press rows one way on one row, and press the seams other way on next row, so when put together they won't be so bulky...and you will be so surprised how they will all meet...and look great...oh and by the way there are " no Quilt Police"...so don't worry and have fun.