There's the pronunciation issue, but there's also the fact that a majority of the statements end on an up tone, so they sound like questions.
tone mostly doesn't decide if a sentence is in affirmative or interrogative. The partical هل decideds
I love how this sounds like an elderly wife reminding her husband of something.
Why the diacritic ِ when its pronounced 3a (or something)?
well actually it is (3indaka) but the text-to-speech machine here really ... really .. sucks. Thats why i guess some people hear it as (3a) instead. Though i kinda slightly here as (3i)