6 days a week is a tad much if you are not experienced. if you are still an intermediate you could be better off training 4x a week max (upper/lower , 5/3/1, Westside or a Push/Pull/Legs in a rotate fashion to still hit muscle groups 2x a week) which is optimal for most natural trainees.
If you are feeling hungry, that is a sign you may still need more kcals.
Hows the scale/mirror looking with the increase in kcals? That is key...Are you losing weight increaing kcals? is the mirror staying lean? If so that is a sign to increase kcals
This is a similar thing when your kcals are so low, you add in kcals and actually drop weight and get leaner.
http://www.bodyrecomposition.com/fat-loss/the-ltdfle.html
LTDFLE stands for Long-Term Delayed Fat Loss Effect (I’d note that I have also seen a LTDGE which is a Long-Term Delayed Growth Effect but that’s another topic for another article). Basically, this is the phenomenon whereby fat loss continues to occur even after the diet has been ended and/or calories have been raised back towards/to maintenance or even above. In the same way that fitness sometimes continues to increase after the period of heavy loading, it’s almost as if there is some type of fat loss inertia whereby the diet continues working even after the person ends it.
So what are you experiencing could be very normal.
What does your split look like?