I have a home that was built in 1959 w/ the original windows. For the obvious reasons, I decided to replace the windows. Long story short, I decided to have Lowe's replace all of the 15 Windows in the house. They installed seven windows before being stopped; the windows were too small. Looking at the windows that were replaced, there are significant gaps between the original frame, and the replacement window. Lowe's argues these gaps are "normal" and it will be covered with trim. I say it's unacceptable to cover the difference with a trim, and a snug fit replacement is necessary. However, I'm ignorant when comes to home repairs. Below are a few pics of my concerns, PLEASE give your advice. I need some solid facts to support my argument to Lowe's. Thanks in advance...