Question about profile display

[sophiedufort]

I often see that members have some type of 'signature', if I can say so, attached to their posts.

For example:
3.4 leopard geckos : 0.1 aft gecko : 1.0 hognose

I gather that the pets listed are those that the member owns, but what about the numbers with decimals? What do they mean? And how can I personalize and apply such 'signature' to my profile?

Also, when I look at threads in which I posted, I see that most members have an avatar picture. I did add a picture in my profile, but it is not displayed as an avatar picture. How can I fix this?

I don't know if the answer to the above was already provided in other threads; if it was, and you don't want to bother explaining again, please point me to the relevant thread.

Many thanks.