1. It's difficult to place tiles to the right of the last tile in a row. i.e. On the Add/Remove demo, remove the Total Deals tile, then try to add the New Customers tile to the end of the line where the Total Deals tile was, it will not let you place the tile until you drag it over the Expense this Period tile.

2. tiles still constantly jump around when placing elements under many circumstances. i.e. on the events demo, move the cherry blossoms tile directly to the left of shells (without moving the tile up)

3. if there are two open spaces, you cannot put a tile in the second space until the first one is filled. i.e. on the Overview demo, move the Visitors tile straight up to the top, then try to place the Currently tile under the Conversion Rate tile, it will not allow you to place it, the only option is next to the Most Visited Pages tile.