I got a refund at 30wks because I did a retest. I was told boy first, had an ultrasound that said girl and did the retest. I took my retest when I did my blood work and they filled the card in for me, came back girl and got a check in the mail 10 days later.
Just an FYI: another poster did an informal count of those results and came up with this
60% told boy had girl
82% told girl had boy
Now take that for what's it's worth, most of those babies are a year old now, so it is "older". And many have not been counted in that. My baby and some of the newer result babies too.
Good luck, I hope they got it right for you!!!!!!