Actually, I noticed that too. Several times they seemed to fudge time and space. This was particularly bad when Legolas and Tauriel go off to the orc stronghold, Gundabad. Gundabad is a long, LONG way from the Lonely Mountain. If you look on the map, it would have taken weeks on foot to get there and several more weeks to get back. But the movie made it seem like Legolas and Tauriel were gone for a day. Not a huge deal, really. But clearly, the movie version of Middle Earth was making some big geographic changes. To make it worse, I don't think that little detour to Gundabad was even necessary.
Then again, the movie does make a lot of changes with regard to time and space. In the book, the dwarves were imprisoned by the forest elves for a very long time and Bilbo spent many weeks sneaking around in the dungeons. In the movie, they shrunk that down to about a day or two.
There were lots of other little things I didn't like. But, I have to admit, they were little things. For the most part, I enjoyed myself for 2 hours and am glad they concluded the trilogy with a bang. I also heard that this movie will have an additional 30 minutes in the director's cut. That's the most additional material of any Middle Earth movie. A whole extra half hour. I'm curious to see what they will add.