The above could be what is happening, with them thinking you have enough credit elsewhere. If it comes yo it, you just make a decision on if they suit you or not. I wouldn't lose too much sleep over it, although I understand what you feel. Keep focusing on your other cards growing, I guess.
@Pway wrote:
I understand that. I'm not going to close the card, I'm just frustrated with them. They used to get a lot of usage now they will get little usage. This card used to be my daily driver but I hate making multiple month payments. I can use my capital one and not worry about my util or having a maxed out card.
This is far more annoying than some people realize. I'm the kind of person who needs a high enough limit that I can spend freely all month and then pay it off on the 30th. If I have to take extra steps like this, I'm not going to use the card. It's not worth the effort to me. Too lazy for that. 
@CatOfSpades wrote:
@Pway wrote:
I understand that. I'm not going to close the card, I'm just frustrated with them. They used to get a lot of usage now they will get little usage. This card used to be my daily driver but I hate making multiple month payments. I can use my capital one and not worry about my util or having a maxed out card.This is far more annoying than some people realize. I'm the kind of person who needs a high enough limit that I can spend freely all month and then pay it off on the 30th. If I have to take extra steps like this, I'm not going to use the card. It's not worth the effort to me. Too lazy for that.
It is incredibly frustrating when a CL is too low to be useful. On one account, AmEx extended only $2k initially on BCP. That was a card that I intended to put serious mileage on for groceries and fuel, and $2k wouldn't be enough to get me through month to month (when your statement cuts but you're already into spending for the next month). I ended up transfering part of a CL from an AmEx I'd had for a while, and then was able to get a CLI so now they're both where I'm comfortable with them, but it took finagling which I found annoying.
Barclay's on the other hand has been very good to me. I applied for two cards with them last year and was very impressed with the starting lines. I don't expect they'll increase at all (I had an LL Bean card with them for a decade or so without a CLI, ever) but they weren't stingy with the starting line for my new cards. Best I can guess, they like a clean file with lengthy history and then perhaps they'll be generous with a SL.
Just my experience. Barclay was one of my early cards and they started me out suuuuper low - $250. I could not get them to budge even a little bit regardless of usage, even as my score and reports aged and got better. I closed the account after maybe a year. Around a year later, I applied for the RIng and was approved for $7500. I really feel like I was bucketed in a very bad way with the first card. Just an FYI. Long-term you may want to consider closing and coming back. YMMV, but it worked for me. Best of luck either way. 
