When I find what I want in imikimi and add my photo/photos to it, I save it in my pictures file. Then I download to photobucket where I can size correctly and make any other changes I want to make. Once I have it the way I want it in Photobucket sometimes it takes a few hours before the changes will "stay put" for lack of a better way to put it. After I'm sure it's set in Photobucket, I go to CP user on the forum and load in the new siggy. That may be the long way of doing things, but I'm not great with a computer and that's how I learned to do it. lol
Life is better because I have a friend like you.