So this is something weird. I made a pattern, add 5mm seams allowances etc and everything was great. I then proceed to change the measurments to have the pattern in a different set of sizes. It works perfectly fine from XXS to XXL... But when I use the 3XL measurment files, my seams allowances on only one pattern piece gets weird, like if they are reversed toward the inside or something :
But when I use larger seams allowances it is back to normal :
Also, it is ok if I use 5mm seam allowances BUT "close" them.
I've checked my measurments many times and they are apparently right, Also I tried to remove / make again the detail ; All my curves are in the right direction.. I don't get it.
It is not a huge problem as I can correct this in inkscape, but I'd prefer not to if it is possible !
Thank you !