When you go to Edit Signature, if you want more than one blinkie to appear, you have to do that in the top section of the page and the blinkies have to live out on the net somehwere. You cannot upload more than one through the bottom part called the Signature Picker area.
In the top section, just click on the little button that looks like a mountain. Then type in the url pointing to the blinkie you want to show up on your signature line.
I try to take one day at a time, but sometimes several days attack me at once.