There is a simple fix for this.
Select the Table Properties and move on over to the advanced tab.
You can use the Sig Option Data Source ID : by setting the value to MAINRECORD as seen in an example below.
According to the IBM Article http://www-01.ibm.com/support/docview.wss?uid=swg21620229
Sigoption needs an Mbo to be evaluated against. When a sigoption is placed on a table, it will use the table’s ‘Data Source ID’ to evaluate the sigoption if there is no ‘Sig Option Data Source ID’ defined. Thus, if the table does not have any record, there will be no Mbo to evaluate the sigoption against resulting in the table not being displayed.