I have a tablix inside a rectangle (Region 1). Below my report I have another table/rectangle(Region 2). If the number of rows returned from Region 1 goes over a certain amount of rows, it pushes Region 2 to the next page. What I don't understand is there is PLENTY of white space Region 1. Why would it push the bottom to a second page? I have tried several techniques including the forced lines on the right and bottom of the rectangle (http://lukehayler.com/2009/07/managing-reporting-services-layouts-using-the-rectangle-in-ssrs/ -- it's mentioned in the comments), Nesting Rectangles and using textboxes inside the rectangle (http://connect.microsoft.com/SQLServer/feedback/details/383350/add-can-grow-and-can-shrink-properties-to-rectangle-control), setting ConsumeContainerWhitespace = True, and many others that I was shooting in the dark.
Attached is a screen print of the behavior. This should fit on one page but again it's not.
I would greatly appreciate any help as I have struggled with this for days.