Issues with Two sets of a load balancer subordinate's web server


We are using piwik version 1.10.1.
We have two sets of a load balancer subordinate’s web server(linux apache).
About each log, although is used, there are the following problems.

・When read continuously, the number of visits will increase steadily.
・Whenever it performs, the numbers of visits differ.

We use
python2.7 /home/apache/htdocs/piwik/misc/log-analytics/

・Are directions for use enough?
・At what kind of time is the “–add-sites-new-hosts” option used?
・When erasing the log of only the day or overwriting, what should we do?

any help appreciated, please advice.