TableLayoutPanel Last Row Size Too Big

My application uses a TableLayoutPanel that resides within a TabPage.

If the number of items I add is relatively small (i.e. it doesn't "fill up" the whole tab page) then the last row's height is stretched. Here is a screenshot of what's happening:

I have tried to change the properties of the table to Autosize, GrowAndShrink, etc. but nothing seems to stop this from happening.

Here are my current settings for the layout properties of the table:

How can I get the last row to be the same size as the other rows?

Thanks