Do you have another Cap1 card? If not, and you still want another card, you can apply for another one and I'm sure they will give you another card with a way better SL.
I started out with a Venture One that had a SL of $2,400 a 18 months out of BK7. That grew to $3,800 before I applied for a QuickSilver and they gave me a SL of $13,000 which floored me. Now my VentureOne sits at $4,300 and I haven't bothered asking for anymore CLIs for both cards because I don't want to wake the beast.