The Hole ID filter option is greyed out and unavailable when multiple boreholes are displayed and the Depth scope is set to Overall depth. The depth log should be correct for all boreholes. The logs are 'hung' at the appropriate depth according to the data tables.
If you want to set a depth log to show depth for only one borehole, you'll need to change the Depth scope to Hole measured depth or Hole true vertical depth. The Depth scope option can be found in the Data section of the Log page of the Property Manager when a depth log is selected. Then, the Hole ID filter property may be changed.
You can read more about these settings in the Strater help: Depth Log Properties.
Updated February 21, 2017