Stitch in the Ditch can be a challenge. I've spent a lot of time beating myself up over it. The three foot rule and the galloping horse scenario is right on!
I've removed stitches that were wonky to me, but I removed all the stitches in that line and started over. I don't know if it's right or wrong to do that, though.
Practice, practice, practice and keep in mind SID isn't as easy as it sounds! You'll do great as you gain experience, I know you will.