Thank you for your reply! I appreciate the clarification. The thing is, I did save it to Photo Bucket as was originally requested, that's why I was perplexed it was gone. Perhaps I didn't process it all correctly.
Anyway, I went back onto photobucket and have since retrieved my original siggy, tested it, and it seems to work fine. Well, it did yesterday, so we'll see with this message :)
Thanks again,
Christina