Beepster
That's exactly what was happening to me except it was across tracks. I'd highlight or select something and other stuff got selected too. I don't recall it happening in lanes though but when I first noticed it I was working on a MIDI track and started locking everything down immediately so I wasn't actually messing with lanes too much. You know what... come to think of it it may have been effecting the very few lanes in the MIDI track. I have not had it happen since though.
This only started happening with X2 (build 306). X1 was fine.
I'm curious... do you happen to use a mouse that requires a driver? I'm using a Kensington Expert Mouse (trackball) and I'm taking a wild guess that it might be a driver issue considering more people aren't talking about this.
Just a thought.
It's always worth entertaining any suggestion as you never know what edge-cases we are running into, but although I need a driver for my Logitech mouse I don't think that's the issue. If I change the screen resolution or resize the tracks and lanes, the selections I make are consistently affecting the exact same tracks and lanes, rather than anything random. It appeared to be random when I first encountered the issue, but since then I've been able to distill this down to repeatable, deterministic steps and obtain the same result with the same projects.
I'm almost certain that my conclusion that there's some internal index issues is correct. Each take lane needs an internal index that is unique so that the program knows how to pass a reference to it to various functions. But if an internal index is duplicated, then it would exactly explain the behavior I am seeing. I realize that there can be many causes for the same symptom, but this one fits the crime too perfectly.
Hopefully with the project I sent to Cakewalk, along with my video, there should be enough for a "quick fix" to this. I hope so, because I want to dive into X2a more but I'm a little reticent at the moment