Oh I see. Mine sits nice and flat but the stitching is slightly wonky. I am happy, yes, just got back from the supermarket.
It’s more a cost issue of this not being cheap for a T-shirt, paid full price at the time $110, plus now another $29 for the alteration. But I didn’t really want to just cut off the bottom of a $110 top myself and am not a sewist except for minor hand sewing so felt unable to try your other YouTube method.
I was pleased that I had checked the length by hand hemming my older coral T-shirt as a test, I took that with me to the tailor so she got the length correct. I feel I will immediately put it into frequent rotation now.
Overall a win.

Thank you Brooklyn for sharing this information! If I'll ever have to shorten a tee I will just cut it and let the hem curl. Very easy for my scarce skills and I like the result. The guy in the video is very professional, explains well and is also funny!

Jenni, I agree it’s hard to justify spending $$ having a tee altered.

Sisi, I’m glad you found it useful.

Re rolling: There are some tees that don’t roll when cut. If a tee has small purl like stitches on the back side of the fabric, it’s likely to be a roller. If the back side looks like a v stitch, it won’t roll. Some heavier tees have the v stitch. It’s a good idea to check by making a small cut on the inside of a hem first and see if it rolls. Or take a small amount off when you first cut the tee so you still have enough fabric left to have it professionally hemmed if it doesn’t roll.

Brooklyn, I would be sick about that hem also. It looks to me like they pulled it as they were stitching so that it would still stretch but that is not an acceptable finished look. I wonder if it could be re-done. The problem is it would roll when you took out the stitching.