Archiving question / suggestion

We have event archiving configured for ADauditPlus at 7 days. Unfortunately, it looks like everything is being written to one file, and that file is either being appended or overwritten. What this means is that if we ever need to go back and re-import data from, say, the week of October 13th, we have to import the entire archive. Why isn't this set up to write archive files on a daily/weekly basis with the date in the filename so that we can import only the dates needed?

Also, I believe the documentation says that the archive will be compressed, but it isn't -- it just sits there as a .CSV file.

We're running version 4.6 build 4621. I couldn't find a changelog for 4622 so we haven't downloaded it yet.