is there still a benefit of zc to you?
if i eat too much fat on a regular basis, which i did trying to listen to what is the 'correct fat/protein ratio', then i'll feel that i'm losing leanness and eat less fat for a few days. so yeah, i think it's entirely possible to be gaining weight on zc. sometimes i eat pretty low fat, sometimes just regular 65%-ish, and occasionally i just crave a lot of fat and that will be a high fat day. just go by what i feel like. i don't count calories, i just know how i feel and how my clothes fit and judge by that. mostly my weight is even, but if it goes up or down by even a couple pounds i feel it and make a change to either increase of decrease fat % for a day or two to get back on track. mostly, i stay pretty even, though.
but, yes, it's too many calories for you if you are gaining. as for energy, i think that is just finding the percentage ratio that works for on a given day. if i just eat high fat, but wasn't hungry for it, it feels heavy. if i'm craving fat, i can eat a bunch and still feel light. but then there are plenty of people who claim zc doesn't work for them energy-wise, so don't just be dogmatic about it. fwiw, the energy issue never phased me.. for better or worse.