Qrmaker size problem, qrcode

Hi Guys! I am facing a quiet weird problem when I use QR code maker plug-in, I changed the output resolution to half(225225), and also the info showed the same result. But when I check the QR code png generated by this plug-in in my mac folder, It showed the size is 450450. I tried so many times but cannot figured out the right solution. Could someone help me with that please? Really drives me crazy:(

Is it actually the correct file you are looking at? If you delete the qrcode.png and try the export again, does it work?
Because, to me, the two QR-Codes look different.

Sorry for the different color confusion, it is the same actually, the same file which be saved in from touch designer. Still don’t know why