I thought the problem might be the images. OK, I pressed "Enter" right after the HeartGold logo, but nothing seemed to change in the "edit signature" box.
However, the logos are now stacked. I think nothing seemed to change because of the way the page edits one's signature. In any case, my current revised signature is acceptable, right?
(Sorry, I removed the "disabled sig" tags in advance so I could properly view the sig. The sig enclosed by those tags made it seem as if I didn't change anything, and I wanted to verify the edit I made.)