I've been doing some table-based layout recently, in my quick-reference cards. I got to know the table flow options real well. Here are some good solid table control features.
Text Flow tab
Get to know this one. Click in the table and choose Table > Table Properties. Click the Text Flow tab.
Break: If you want a cell to start at the top of a new page or column click in that cell, and then in this window select Break and Column or Page. Conversely, if you've got a table that starts at the top of a page or column and don't want it to, unmark the Break option.
Allow Table to Split Across Pages and Columns: You're going to have some weird layout with your longer tables if you don't let the table at least split across columns.