Uh...if you do your math, it's you who are over counting.

oatmeal and fixins (300 calories)
40 grams of peanuts. (237) calories.
a fresh banana (155 calories)
some peanuts or walnuts and raisins. (Another 250 calories or so.)

That's less than 1,000 calories before lunch. Unless you want to count your lunch (a grilled cheese sandwich on homemade rye bread with peppers and onions and some chips (763 Calories.))

And then count your lunch again.

So in fact you're at 1600 AFTER Lunch. And if you eat roughly the same thing again for the rest of the day, that puts you at about 3200 Calories for the day, not 5,000-6,000.

I am not trying to pick nits here....but it's pretty common to estimate that an adult male needs around 2500 +/- per day...so you are in the ballpark with 3200. And that's good estimate for on the trail as well.

With 5,000-6,000 you are way off the charts. The guys who ride in the tour de France use that many calories every day, but they are working harder than you or I will ever work, at home or on the trail...
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