Sorry to hear the suggestion to stretch time between feeds hasn't improved the first feed for you. Is there anything else that could be affecting her willingness to feed, e.g. Could it be you need to increase the flow rate of the bottle teat, or are you giving her any solid food at all?
Other than this, have you tried offering the first bottle shortly after waking and then not offering it an hour later even if she hasn't taken much...and then leaving the four hours. She may catch up again later in the day and then re-set to an earlier feeding time. Kara, do you think it might be ok to do this?
It seems from your post that she is taking about 24oz over the course of 24 hours, it is possibly a little low, but depends on the weight of your LO.
I'm sure Kara will have some better advice but if that is all your LO will take and she is happy and healthy and gaining weight nicely then it may just be all she needs. Some of my IRL friends had babies who never fed as much as the recommended guidance amounts. Hugs x