ROC-RK3399-PC Case not made correctly

Just recieved the ROC-RK3399-PC and heatsink case and both ends wownt fit, I can make one end fit but then have to flip the board to make the other end fit. Works both ways, but only one end fits at a time. Is this a one off mistake or are there lots of cases built like this?

email from manufacturer states CNC guys made an error, sent me a corrected case,