In SEPM 14.2 (Symantec Endpoint Protection Manager), the Monitors/Logs page does not retain chages to filter limit setting on number of displayed items
This is fixed in SEPM version 14.2 RU1 (14.2.3332)
{FIXED_DOWNLOAD_LATEST_SEP.EN_US}
Workaround is to manually set the limit to a certain number when viewing logs, since this setting cannot be saved to a customized filter.