i have done a lot of testing but for some reason on the site when i try to play the song it sounds glitched at the start this is the map beatmapsets/1815334#osu/3725576
was your preview point originally at 02:44:742? playing the song from there in the editor sounds just like the preview point on the site. as Zelzatter Zero said, it takes a while for the preview point on the site to get updated after you change it, so you just need to wait