Your doors should fully latch when you shut them, and your deadbolts should work smooth without touching touching or rubbing against wood or the strike plate. This can be a simple and easy fix for newer doors or houses, but on very old housed like mine here in Taylor, the wood on the door frame that you screw the plate to looks like it's been chewed up by about 100 "adjustments" over the years. Most of the time this this problem can be solved by replacing the normal sized strike plate, with a longer plate that the screws can be properly secured in a part of the wooden door frame that still has wood to screw into.

The main reason the plate needs to be adjusted is because of settling or shifting foundations. But there's more factors you might not have thought of. The weather, especially changing humidity, has a huge impact on the wood and lumber your house was built with. This can happen over a few months, or practically overnight when we get a heavy rain after a significant dry spell. Then there's swaying... All houses are sort of swaying back and forth over months, years, and decades. This swaying motion is incredibly slow, and maybe only by an inch or 2, but because of the precise right angles of floors, walls, and doorways, that slight difference will cause your doors not to latch and lock for a while until it sways back. This too can be fixed for good with the proper hardware and a legendary locksmith.