Nutrition Advice (Vegan in Plateau)

Hey everyone!

Actively learning about nutrition has been such a breakthrough in my relationship with "dieting". This notion of restrictive, traditional deprivation was flipped on its head to an abundance of healthy, balanced food. BUT I'm not a nutritionist or a dietician; I'm just a regular person who likes to understand nutrition for optimal health. Maybe that's why I get overzealous and swept away in a tidal wave of information from time to time...and well, confuse the heck out of myself.

This is where I humbly ask for sincere, outside advice. I was vegetarian for 7 years and have been vegan for 1 year. I feel better than ever, but even so I'm still working toward toning up and losing some fat. I've got about 7 pounds more I want to lose, and I've been plateauing for about a month now. I'll gain or lose and inevitably end up back where I am.

First, I've shaken up my workouts by adding in boxing classes (4 hours of cardio & conditioning each week). Plus, I run 12 miles every week, I do weights/circuit training twice a week, and I do yoga for 3 hours each week.

I workout really hard, so I feel like the problem must be with my diet then. According to MFP, my baseline caloric intake is 1220 plus the calories I burn working out. I usually average between 1300-1400 calories daily. That average isn't from deprivation, but it's where I feel comfortable; eating any larger portions makes my stomach hurt . I try to keep my carb:fat:protein ratios around 60-70%:20-15%:20-15% based on what I've read from Brendon Brazier.

My intentions are all good and well, but clearly I must be doing something wrong. Any ideas? Should I up my calories? Should I modify my carb:fat:protein ratios? I feel like an easy way to up my calories, if that's the answer, would be to include some healthy fats (like a handful of nuts or some avocado), but that would probably throw my ratios out of wack. Do the ratios even matter that much?

Thanks in advance!