LEM nDepth Results vs Result Details

I'm searching raw log messages using text input mode in the ndepth window.  I put in my search terms, define a time range and send off the search.  When the search completes, the histogram shows some number of results across the time period, and in the Result Details pane I see the log messages.  My issue is that the Histogram result counts never match up to what's displayed in the Result Details.  Is this expected?  What's even more odd to me, is that the result details seems to grab log messages randomly from within the search time range.

Here's an example:

This is making it hard to export the full results to a CSV, as the CSV only ever gets the events from Result Details.

Thanks for your help.