We are having a double billing problem. If we manually charge an account, the system doubles it. Then if we credit it, it doubles the credit too.

Most likely two instances of your Admin Control Panel are running at the same time (either 2 instances of TomCat, but startup scripts were fixed in 2.08, or Tomcat and Apache Jserv). In the latter case, check your logs:

grep FINISH /tmp/hsphere.log*

If you see that two periods ended simultaniously, you are running two copies of your CP.
Alternatively, run the following command:

ps axuw | grep java

If you see both “DTomcat” and “org.apache.JServ” words in the line that appears, both are run by your system.
Next, stop the one you don’t need or, which is more preferable, stop both and start either Apache or Tomcat.