Yesterday we had an over the counter microwave oven installed. Afterwards I noticed the upper screws were installed in the upper cabinet crooked. The worst one, which is about 30 degrees off vertical, is shown in the photo. So, is this a potential safety issue? I know it’s an incorrect installation but will these screws come loose after many door openings and closings? I also wonder if the microwave is removed for repairs will they hold it at all on reinstallation? These are machine screws designed to be threaded into a threaded hole.