Duplicate SenseMonitor frame filenames being generated at LHO

Both LLO and LHO contain the following directories in the diskcache/datafind index: /gds/dmt/trends/SenseMonitor_HOFT_X1 and /gds/dmt/trends/SenseMonitor_X1. These directories contain files with identical filenames (eg L-SenseMonitor_hoft_L1_M-1368432000-3600.gwf) but different contents (md5sums don't match). At LLO the SenseMonitor_HOFT_L1 were only generated for a month (1365876000-1368464400, while at LHO they are still being generated.

The duplicate frame types in different directories is causing unexpected output behavior from gw_data_find, which is causing problems with summary page processing at LHO.

Can someone explain what these SenseMonitor_HOFT_L1 frames are, why they are still being generated at LHO, and whether we can drop the both the SenseMonitor_HOFT_X1` entries from the diskcache/datafind index?