Export lopping off hour in hh:mm:ss

Hi - I’m trying to export (as tab-delimited text) the contents of selected tiers and just for one set of files the export lops off the hour even though hh:mm:ss is selected. Tried several different ways but same problem. Using Mac (mbp and iMac) and tried with both versions 5.8 and 5.9.
Thanks for any hints.

Hi Diane, do I understand it correctly that for some (sets of) files the hours are removed and for some (sets of) files not?
So far, in some quick tests, I haven’t been able to reproduce the problem. I was wondering if you have checked the exported file in a text editor (e.g. TextEdit) too. Some spreadsheet applications apply their own formatting to a column, based on the detected or guessed contents, when opening or importing a delimited text file.

-Han