First, that pesky little bump at the end of a sc row on any motif can really get in the way when stitching the squares together. I'm going to "try" to explain what I do to get rid of the bump.
When starting the single crochet round, I usually ch 1 and single crochet into the NEXT stitch. I know this isn't your usual way of doing things, but it helps with the "bump." Next, at the end of the round, I slip stitch into the first ch-1. After slip stitching, I cut the thread/yarn and pull the loop until the thread/yarn is completely pulled loose and is on the right side of the work (don't do the slip stitch again). Then, I insert the hook from back to front of the NEXT stitch and pull the thread/yarn through to the back of the work and secure the thread/yarn with a sl st to the back of that single crochet. This puts the "bump" on the back of the work. Now, insert the end of the yarn into a yarn needle and weave it through several of the back stitches of your work. Pull gently on the yarn until the "bump" disappears, now pull your work so that it goes back into shape if you pulled it too hard. Now, continue weaving your stitches in opposite direction with the needle as normal.
This technique will work with double crochet rows as well, but I haven't
noticed the pesky "bump" very much on other than single crochet rows.
That was a bit difficult to explain, so I hope you understand. But, if not, let me know, and I'll try to help you with it.