The same thing happens with us in our relationships with others. You get upset, somebody really hurts your feelings, and you wanna let them know, now. These are the kinds of conversations that start in your head and keep you from sleeping. You feel justified by Scripture. I mean doesn't it say that if your brother offends you to go and talk to him about it? The thinking is alright, but when your first words are something along the lines of "I thought you should know..." you are speaking out of your hurt. Plus its probably not a good sign if you can't discuss this situation during "normal operating hours." Early morning and late night texting are not good means of communicating your need to help your brother.
There is something to be said for allowing yourself to wait it out. Maybe this situation is eating at you in order for you to take it before God and allow Him to give you the words that will help to restore the relationship with your brother.
This might be one of those moments that you're not seeing the picture clearly since you are so close to the situation, or you misunderstood, or that person made an honest mistake and didn't mean to hurt you in the slightest. Forgive, let it go, give it to God. If it needs to be addressed, ask your Father for the right words and the right time, and even then understand that not all things are resolved according to our individual liking or even in our lifetime for that matter. Don't rush in, full of unkempt emotion, creating an even bigger problem.