Alonzo wrote:

my preferences are:
Connect to network about every : 4 days

but caching is only about half a day.
if i raise to 10 days, then caching is about 1 day.

i am frustrated about this because it seems i am the only one with
this problem.

You're not the only one.  I had a similar issue last year.  I solved it
by downgrading to an earlier client (4.19) -- I can live without all
those extra "features."

If you want to go this way, you can get an archived copy of it here:

http://www.cafesociety.uk.com/other/boinc_4.19_windows_intelx86.exe