It's not unusual for the carb to be inconsistent after only a week. Give them a couple more weeks and it should be better. And if you feel it needs more honey malt, then add more honey malt. If you started with 3/4 lb per the posted recipe and are thinking of increasing it by 1/4 lb, I don't see any issues with that, so go for it. However, if you are suggesting adding another pound on top of the original .75, well that may be too much and I wouldn't recommend it. It wasn't clear to me which you were looking to do.