Photoshop :: Color Fill Vector Masks

I create a fill adjustment layer. I create a vector shape and apply it as a mask.I have the mask selected, now I draw more on that layer and it continues to draw.
 
What actually happens:
 
create fill adjustment layer - Hey, starting off strong create a vectore shape and apply it as a mask under Layer>vectore mask>current path - different icon, but it seems correct..I select the path under the Paths tab, since the vector mask doesn't show u next to the layer icon, and attempt to draw more shapes -here's where it goes wrong. Instead of drawing on the path layer I have selected a work path layer is created.
 
I can't actually figure out how to draw on the existing path. If you select the paths from the work path, you can copy and paste them into the actual color fill shape path layer. That works.Now try the same thing with a different layer. Oh....NOW it works. It actually seems to work with all the other adjustment layers. It just doesn't work with fill.

What I think is happening: Some smarty pants realized that there doesn't really have to be a difference between a shape layer and a fill with a vector mask on it. Yeah, that's true, but you're limiting me to 1 single object on that layer now.