A while back I asked for a CL increase w/DMB and they did a hard inquiry. I got it removed, since I was told that would NOT happen. Here's what I just realized. DMB has been doing soft inquiries - AR (account review) - every few months. They don't HAVE to do a hard inquiry, but they obviously do to "mark" your CR. Reminds of an animal marking his territory.. and yes, you're quite welcome for the image.
Same thing happened to me. I called in August for a credit limit increase and was promised by two different departments, no hard. LIARS. However I also got it removed, but am just going to use the card for utilization ratios. That'll teach 'em.