Why over stay? Just extend your visa, you’ll get an overstay stamp in your passport not something you want to have if you come to Thailand all the time
if the court gave him 2 years I think the immigration officer must of made a mistake when they stamped. Happens all the time at immigration. Worth the try if you have a kid here, worst case you get sent back
If the court gave you 2 years just change your passport and enter with a fresh passport? If the system says 2 but your passport 5 I think it should be fine entering with a new passport.