If all the rows of a table don’t fit on a page, some of the rows move to the next page. Never fear, you can control how the table breaks between pages. For example, you can specify that two rows always appear together on the same page. You can also force a break at any row in a table.
Keeping two rows together and forcing a page break are not part of the table format settings, they are custom settings (similar to text overrides), which you make on a case-by-case basis. If you apply a custom setting to the table, it is not overwritten when the table format is updated.
Keeping two rows together (bumping a row) allows the table to reflow if the content before the table is changed. Forcing a page break will force the row to the top of the page until the break is removed.
Just as you can have a table or paragraph always start at the top of a page or column, you can do the same with a specific row in a table. Later, you can remove the page break if you want to.
If you have a table that won’t let you break across two pages: