Not at all. Mismatched patterns do bother me but I don't even see this.

Looks matched to me...and I even squinted LOL

I don't think anyone would ever notice this when you are wearing it, but if it is something that is going to bother you at any level you should return it.

I had to go back multiple times to see what you were talking about. Since the horizontal lines match really, really well -- it's hard to see that you are talking about the centering of the vertical lines in the plaid pattern. I think our eyes are much pickier about horizontal lines.

You could try other vests but this may actually be one of the better executions. So if you love it, I say keep and wear in good health. Great price too. Are there other aspects of the vest that look well made?

I can barely see what you mean, so it wouldn't bother me at all!

Not at all. What CocoLion said. It's very well plaid- aligned otherwise. I really never noticed it. And ditto above comments on, just decide whether it's s fab item for your wardrobe. If if was sales- goggles only, then return for that reason. Matched stripes and plaids aren't always well- done but you also need to love the cut, length, fabric.