Another thought is to create two callouts, turn off the title or titles on the sheet and hide the callout tag on the section. That way you can adjust their crop boundaries and move the two callouts closer together. I can see where breaking the crop boundary could have adverse affects when exporting a sheet out to DWG. It shouldn't cause the issue your experiencing, but nothing is perfect and there is always more than one way to skin a cat. Just an expression, I am not advocating skinning cats; Splitting hairs, yes.
I still like using dependent views over two callouts.
Mel Persin, AIA
AEC Technology Consultant
Technology to Visualize and Realize Solutions
MasterGraphics, Inc.