Ok, I got something.
Please tell me, if you experience it too and whether it's disturbing or not:
1) Upon changing a channel, the setting for the EQ-Button always reverts to "Compressor" (probably the first item in your Pro-Channel respectively).
That's not that big of a deal, however I'm sure it would be far more convenient, if the setting for the EQ-Button was remembered throughout changing tracks.
2) Upon clicking on any open windows (VSTi e.g.) the same happens - the setting for the EQ-Button reverts to "Compressor", even though you did not even change the channel.
3) When the EQ-Button is lid (no matter what mode it is in) and you doubleclick on a VSTi on the Synth-Rack, the ACT-values are shown on the channel strip control screen. However the ACT-Button does not light up - the EQ-Button stays lid instead.
4) When the SEND-Button is lid and you doubleclick on a VSTi on the Synth-Rack, the ACT-values are
NOT shown on the channel strip control screen (which now is blank)
AND the ACT-Button does not light up - the SEND-Button stays lid instead.
AND: now pressing the ACT button does not reveal the ACT-values either - you in addition have to press one of the PAGE-Buttons, to get to the ACT-values.
These seem to be minor bugs on their own, but as a whole they add up to the confusion that (especially when on a roll) you don't know, which parameter you're just editing with the channel strip control knobs and buttons. Because the lights don't always add up, or you are actually changing values for a different track, as Mully, Dyonight and John T explained a few postings above.
The Pro-Channel kind of broke the VS-700 channel strip control.