I'm sure the original poster has remedied their situation by now. In case someone else runs across this post later, I thought I would give some additional information to help. Any time you are getting a flute, whether renting or purchasing, make sure you play test it extensively before you leave the store. Also, check to see if the flute fits properly in it's case. I've seen flutes (especially rentals) stuffed into incorrect cases, which of course leads to bent keys and misalignment.
Most issues with woodwinds, assuming their pads are in good shape, can be fixed with very quick, minor adjustments. Most stores can do those on the spot before you take it home. I do these kinds of adjustments for my students all the time, which saves them time and money and it keeps them playing and practicing, win-win
