Before splitting table, I check table preferences, so that 'Repeat Heading' box in not checked. Then I click on Split Table and choose 'No Heading'. However, Writer will take the first table line of the concerning page over to the next page. When I check table preferences again, 'Repeat Heading' is still not active. So I have to remove the obsolete line manually.
Mmh, look like you reported it first :-).
But, I have good news. It is fixed :-)!
Cecause I fixed it related to bug 62670 (and also mentioned that in my patch), I think it's easier to mark this older bug as a duplicate of a newer (fixed) bug (although you reported it first).
*** This bug has been marked as a duplicate of bug 62670 ***
pure bliss! cheers! :)