Q: Broken expose when Screensharing?

When screen sharing and using Expose to switch apps, it usually affects on the target computer, which is the default behavior.

But now it doesn't work that way.  It switches the apps on the current computer. 

It used to work just fine but it's been a long time since it has worked properly.  It hasn't at least for the last three OS X versions.

OK, so I use around 20 different Macs at work and have used screen sharing in many different ways with pretty much all of them.  I'm pretty good at searching out fixes for any problems but this one has been bugging me for a very long time.  I've checked all the usual suspects but no luck.  Searched all the forums and tried any suggestions I found but no luck.  Now I'm asking directly.  Can anyone please help??!!

Is this a Terminal thing?  Could someone at work have typed something in the Terminal that would turn this behavior off?

This only happens when I'm on the MacBookPro5,3 Mid 2009 Intel Core 2 Duo when screen sharing with any of the other Macs.

Thanks for the help!