Jessica, that failure on the bottom of the 'W' stitches is pretty common. I've certainly seen it before! The tisssue cannot be re-stitched, but keeping the area clean, using your antibiotic ointment, will allow it to heal well. The body is amazingly good at this. At the 6 month point you'll have a whitish line there, and at a year even this will be fading. Yes, it will be detectable by someone looking for it, but not terribly obvious.
I had an opening on one leg of the incision. It's a very faint mark 16 months later. I helped one girl who pushed too hard after GCS and ripped open the entire lower 'W' into the abdominal cavity, requiring hospitalization for a month. Five months later it's a narrow whitish strip, largely covered by hair growth. (It looks worse to her than to others, as she knows where to look with a bright light and mirror. Note: Don't let strangers wave bright lights around your uncovered nether regions!)
The human body has an amazing capacity to heal.