weewx.conf.yyyymmddHHMMSS is a backup of weewx.conf made when an install happened at yyyymmddHHMMSS(the installer always backs up weewx.conf irrespective of what you tell the installer to do/use). weewx.conf should be the post install config file, whether it is based on your existing pre-install/upgrade weewx.conf or the package weewx.conf depends on what options you chose during the install/upgrade.
The easiest way to tell what is going on is to look at the log. Unfortunately the log extract you provided was truncated so we could not see the startup. Go back to the log and read through from when you started WeeWX. The log will tell you exactly what weewx.conf was used and that is the file you must update. Gary -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/e5b71bce-00e9-42f8-a95a-66eabd02bf78%40googlegroups.com.