I must have mine to line up. And they do. I don't know what to tell you, though, that might be good advice. Other than pinning ... you stick a pin (Pin #1) in the one side exactly where the seams meet and then continue (same pin) into the next section exactly where the seams meet ... then pull the pin (better if it's a glass-head silk pin) as far as it will go; take Pins #2 & #3, putting one on each side of Pin #1 and secure your 2 sections before removing Pin #1. If it's still "iffy", drop your sewing machine needle into the spot where Pin #1 was, making sure that it is exactly where you need to sew and sew from there one way, check it for accuracy, turn it around and sew the other way. This probably makes no sense and I wish I could show you ... it would take us only a couple minutes.