mlrubin said:
Any idea why, once I "identify" a header row in table properties, it won't
appear on subsequent pages?
No... But you have not given us much to go on with...
If I had to guess I would say that you have inadvertantly activated text
wrapping for the table. Select the table, then do Table > Table
Properties...> "Table" tab > Make sure that Text Wrapping is set to "None"
(In the second row of small table icons in the dialog box).