"Why oh why can't you use the vbulletin system??? You can but not here. There are sites out there which use the vbulletin message board, we don't and have no intention of ever doing so; this, as we personally don't like that system.
If you wish a date range sorting where responces are shown by date sort and not by thread, then we recommend using the "blue button" interface (found below the host pictures and next to the drop down menu with the date range sort).
Using the date range sort, things are handled by date rather than by thread. The red picon is a topical sort that some others prefer.
If you insist on the vbulletin system, check out one of the sites that uses it.