Some odd reason I can't see the FICO picture you posted.
I have what I think would be a fairly high total credit limit in regards to my personal and business cards. One has a $25k limit, one has a $20k limit, my AMEX Delta I have come to find out only has a $2k limit on it, my CITI VISA Signature has a $18k limit on it, I have a USAA that has a $20k limit, a Pen Fed with a $15k limit and the Surpass with a $8k limit.
What I don't understand is why is AMEX giving me such low limits while others are giving me what I consider fair limits? I had no idea my Delta card had a ridiculously limit until the agent offered to pull $1k from the Delta card and put it on my Surpass card.