One of the things that makes crochet so unique is the fact that you are working with only one live loop and you can work a new stitch anywhere. However this is also the things that can make pattern reading a bit more challenging, as you attempting to understand exactly where the stitch it to be placed.
This can readily become apparent when working stitches rows below, or around stitches in different places. For example, working a front post double crochet 2 rows below, can create a dramatic effect but can be difficult to explain the placement in written words.
The other point that is not always noted is the when working stitches in rows below, is that it helps to create “long loops”. If you keep your usual stitch tension you can often find that your fabric will pucker or become distorted, but a simple trick of pulling up the anchoring loop a bit taller can alleviate this problem.
With the term “anchoring loop” I am referring to the first “Yarn over and pull through” of a stitch. The loop immediately following inserting the hook in the stitch. I use the term “anchoring” as it is a step found in every stitch, and it adheres it to the fabric. Without this anchoring loop the stitch does not attach to the other stitches.
So, when pulling this loop through the other stitches (crochet fabric), you need to pull the loop up higher. High enough that when you finish the stitch you are working that it is even with the adjacent stitches.