Calculators are all well and good for getting a handle or an approximation, but because everybody is different metabolically, calculators only serve as a basic rule of thumb in my humble opinion.
Your maintenance calorie intake is what you normally consume on a "normal" day when you don't have any particular goals. If you generally consume around 2000kcals, give or take -/+10% and you donnot notice any real significant increase or decrease in bodyweight, this is your maintenance weight and intake. If someone is healthy and wishes to gain weight I usually advise them to increase their daily meal intake first. So if you your normal diet is three square meals per day, I tell them to eat four square meals a day. This would usually mean an increase of about 3000-4000kcals per week, enough to increase bodyweight by around 1lb per week with exercise output and sleep/wake cycle all unchanged.
What do you mean by, you get to a block? Are you having difficulty consuming more kcals, like you get too full quickly. Or...are you having problems with sources or proportions etc?
Most bodybuilders hate eating carbs after 6.00pm because it is more likely to be undigested and metabolised fully, and hence stored as fat. However, if you're not vulnerable to indigestion, you might want to consider eating a 600kcal to 1000kcal meal after 6.00pm, lets, say, 8.00pm if all the other options fall by the way-side.