It's mostly because all of us working on this are busy at the weirdest of times, so when one of us is free, the others are busy and as a result the chapters come out at a slug's pace.
Actually we're just lazy.
To answer your question though, yeah, most translations are usually behind the raws. Of course there's a lot of TL that are caught up with the raws, but most of the manga you'll see is behind.