There is nothing you did wrong; it's all about their underwriting style.
I can have an Amex with 8k limit before Discover, and a Chase card with 7k limit after Discover, but Discover only gave me 2k limit and never allows me to request a CLI online. When applying through chat or phone, it goes to straight denial. They are well known for being such conservative, and there is nothing much you can do except for moving on.
I'd advise you to keep waiting, and/or consider other lenders like Amex who are known to give limits more comfortable to you. However, there are many rumors about how Discover provides automatic CLI. I'll just list them here, but don't treat these very seriously
. You want to use a card a normal way, not with these so-called tricks. Furthermore, many people who have done these still get no luck with any CLI.
- Keep sockdrawering the card and you may receive a tiny auto CLI.
- Carry a balance and you may receive an auto CLI.
- Swipe the card a lot, do a large number of transactions, and see an auto CLI.
- Charge it up to near the limit, wait for statement to cut, pay it off, and get an auto CLI.
- Use the automatic customer service phone and request a CLI, get denied, when it says transferring to a representative/analyst, hang up; later you will see a small CLI.