There are also certain specific legal terms and phrases that work kind of like reserved words or functions in a programming langauge, because they invoke a specific legal effect in how the court needs to handle them. If you don't phrase your motion properly, your motion could be denied because it. Or maybe the judge let's it slide, but you piss them off and wear down their patience.
Anyway... For us, it sounds funny because we're ignorant of it. Just like how programming languages may sound funny to non-programmers: "If X then Y else Z" is similar enough to English, but it'll make the kids giggle if you ask them to read it aloud.
But this weird, kinda archaic, jargony, overly-specific English is just how regular motions are written, by real lawyers in regular courts.
(And yes, it does sound funny, if you're not used to reading/writing it.)