r. t. stands for room temperature it is an approximation of the standard lab conditions that mean 20C temperature and 760 mm\Hg ambient pressure. MeNH2 is a gas so the slower and more portionwise you add it the less will escape as a gas (don't worry it is always added in excess) but the point is that the needed amount is a must to react with the substrate. The flow was regarding the optimization of workup that is dependent to the exact procedure you perform so I can be of help only if you give me a detailed procedural writeup of what you did and what resulted, I can evaluate and make suggestions based on that.