As already mentioned in the same post over at OCN forums, the problem is likely the missing mounting brackets. Without them additional pressure is applied towards the display interface that can bend the cover. Please try it again with them installed and do not unnecessarily tighten the screw. They should just keep the cover in place and do not have to handle kilos of weight.

For your second problem you will need a new spacer. It seem that without our knowledge the supplier of these spacers has slightly changed the diameter so it fits not correctly anymore. Since the real time clock is rarely used this problem has not come up to our attention so far.

As already discussed by e-mail we can send you new spacers.