If you're using the Mackie Control / Mackie Control XT / Mackie Control C4 surfaces, they do interact with each other.
In other words, if you've set up 2 x Mackie Control, selecting track 3 on one surface will automatically select track 3 on the other.
If you need more than one Mackie compatible surface to act independently, download my version which will give you up to 3 extra independent "sets" of Mackie controllers:
Multiple MIDI controllers
in Cakewalk by BandLab
Posted
some help in how to set up so one controller works tracks and the other does busses please