B.M.
I had no issues with getting my ears pierced at Claire's a gazillion years ago (neither did my sister) and my daughter's ears were pierced with a gun at sweet & sassy a couple years ago when she was 8 and she had no problems. But I have heard of people having problems.
Here is what I can tell you about reclosures. I got my ears double pierced when I was in the 7th grade. A couple months later I tried out for the basketball team and had to take the earrings out for practice and games - and they just sorta closed up throughout the season. I definitely have BOTH scar tissue that you can feel and a scar that you can see. But you have to be looking for both - if you just walked up to me you wouldn't notice.
However, when you have them repierced they can go through the SAME hole and it will go right through the scar tissue with no problem. with the ears that is OK. with (Ahem) other areas of the body, not so good to pierce through scar tissue.
And don't worry that you damaged your kid. She's resilient and it will be ok.