How to prevent different wall types from auto connecting

[rvbinder]

I want to draw an exterior brick wall that meets the exterior brick wall of a house.  The exterior wall is 7' tall x 8" wide and has a 3" concrete capstone. I defined a retaining wall, pony type with a footer foundation for this - the lower wall is 8" brick, the upper is 10" concrete. The house walls are brick veneer with interior framing. 

 

As soon as I draw the exterior wall close to the house wall, HDP automatically connects the wall and transforms the wall type of the fence to the house wall, and extends it all the way to the top of the second floor.  I tried adding breaks but no help. 

 

How can I prevent the wall type from being changed in type and size, yet still have it touching the house wall?

 

[solver]

Please post a simple plan demonstrating this.

 

4 walls to form the house, and your exterior wall.