I get the "feels off" too, but I've had that happen with designer-made things too. It looks good enough that to me it seems as though someone with some decent design skills and/or a newer designer created it. The longer I look at it the better it looks overall, but the stronger the "slightly feels off" feeling gets. Pretty wild!

Edit: I think maybe the color on the tea cup is what is feeling a little off to me. Overall I love the logo, but I perhaps if the tea cup color was changed to be closer to the background color at the top?