Rukario's the one who handles donations, so try and ask him if your donation went through and you should eventually get that beautiful green name. As for me, I didn't actually donate, mine was given as a gift for my 20th birthday last year.
Hey, how long after you donated did your donation register? I've donated a total of ten dollars so far, five last week and five today, and I'm not on the donor list and no green name, obviously. I don't think the last one has gone through yet since it's late on a Friday and my bank says it's on hold for now, but still, last week's donation isn't on the list?