Taht is a great tute on french seams nor'easter. Thanks!

This is my second pillow case and I had the same problem on this one as I did on the first one...trying to get the bottom corner square on the side with the french seam. Otherwise, it turned out pretty good.

I am having that problem to. How do you fix it so it is square?

You know what I'm talking about, right? I took a picture to show what was happening but I don't know if you can see it in the picture I posted.
I don't know if it has something to do with the way I pressed the side seam...anyway I haven't figured out how to correct it.
Can the side seam and bottom seam be sewn at the same time without all that turning in between...then turn the pillow case inside out and sew the french seam down the side and bottom?