You weren't happy with the previous sangle, you're not happy with this one either. Honestly, these bags are all hand made, they won't be perfect, and if they were all absolutely identical, I'd be a lot more suspicious of the brand. But yeah, look, if it bothers you so much...go into a store and inspect every sangle they have there, definitely easier on both you and your SA that way I think.
Personally though, I definitely wouldn't have noticed it if it were my bag (I wouldn't have noticed the previous stitching issue either though lol).