I just don't get people sometimes

I am in the middle of a project at my daughters school. I have been involved with it since about October. We have a due date that is four days away. The person in charge has done this project for a couple of years, she knows the inside and outs of getting this project done. So, I have totally let her be in charge. I was only asked to help not to lead. That is a-okay with me. The other person who was supposed to be helping is more of a stronger personality than mine. Where I tend to lay back and let others make desicions (really because it doesn't matter to me) the other two were wanting things a certain way and they have eyes to see differently. Which is all good. In the grand big world we need people of both kinds doing both things. I am totally fine with that. Now, the whole situation has gotten nuts. The woman in charge hit a personal tradgedy in January and that has effected the project. Now we are under the wire to get this all done, which again I really don't mind. There should be grace for those who are going through stuff. That is just how I feel. As a person I need to extend the same grace to others that I would desire to be extened to me. Because, now that we are ready to finish the project the other woman, not the one in charge, is lashing out and is going through her own personal stuff. She is just not happy and now she is dumping her stuff on the woman in charge. So, here I am patting hands and just telling everyone "Cant we all just get along??" No its not that bad, we are just trying to get some stuff done. It will all happen. I know that much. I just don't understand why we (I only sometimes do it though ;) ) as a people do not put others first sometimes. I would hate to walk in either woman's shoes, but the Lord above knows how much they can handle and so He is with them with every step they take.