The issues for the serious matters raised in this thread are: 1) the core issue of only being able to define one table on a worksheet: http://code.google.com/a/google.com/p/apps-api-issues/issues/detail?id=2377
2) the derivative issue of the table's column names and the sheet's colum names being considered as the same thing: http://code.google.com/a/google.com/p/apps-api-issues/issues/detail?id=2378 3) the still-more-derivative issue of not being able to insert an entry in the table feed because of validation on the header cells of the worksheet under some circumstances: http://code.google.com/a/google.com/p/apps-api-issues/issues/detail?id=2380
