Allright, a couple of things went wrong here.

1: I made a typo claiming i've send 0.9. This should be 0.09
2: All amount smaller then 0.1 are considered as 'donations', thus not being processed.

BITMIXER.IO claims they will process my payment, so if they do, i have to offer my public excuse to them.

Small advice to bitmixer.io: Make this more visible on your website BEFORE users send money.

This being said:

LEGIT SITE