Piano Roll Weirdness revisited

Recently I posted about the Piano Roll not allowing me to navigate properly. I thought I had fixed it, but now I have just started a new project and it has come back...in aces! This started happening after the first note placement, so it's as simple as it can get.
 
EDIT: My process was: open a blank project. Add a MIDI track (Insert: MIDI track), insert an instance of Dim Pro, then assign the output of the MIDI track to the Dim Pro. Then placed I notes on the Piano Roll.
 
Platinum 22:9:42 Build 42   64 bit
 
The first note I placed was at 1:01:000 I adjusted its length and then placed another note event. It appeared at 1:3:561 and also the time indicator line jumped to there in both the Piano Roll and Track Pane.
 
Then I could not move the time indicator line in the Piano Roll, but only over the Track Pane. If I use the Track Pane to set the time to 1:01:000, if I then so much as click on the Piano Roll, it jumps to 1:3:561
 
All notes now default to 1:3:561 as their start point, no matter where I place them in the Piano Roll. I can then place them correctly.
 
Clearing all notes resulted in everything now jumping to 1:01:280
 
Any help GREATLY appreciated! I am flummoxed.

I thought I had posted a reply….
 
Anyway, thanks for the ideas.
 
I seriously do not think it is anything to do with the first note being at 1:01:000. Normally I would leave a gap, but I was just placing notes at random for this. ATM SONAR is refusing to place notes anywhere else _but_ 1:01:000!
 
I tried snap settings and that has not helped. I can’t see how I could be getting zero crossing snap, with no audio at all. At one stage the notes would go to one location if I used a double click on the smart tool and another location if I used the draw tool.
 
I tried two older versions of SONAR and they were OK.
 
Maybe I will just update to the latest version and see what happens....when Tell$tra lets me have more than 65KB/s downloads :(

I was going to say it may be a video card/driver issue... but I'm too late.  I've had countless video issues like that over the years with every version of Sonar known to me (which is only a handful).
 
As far as starting notes @1:01:000, I've done that with every project I've ever done over the past 16 years with no issues that I can remember, so that should not be a problem.
 
As far as Sonar crashing, my version likes to crash as soon as I click it's icon to open it. Crashing before it's even open... Let's face it - Sonar luvs tu crash! Period! that would be one of these: (.)

I'm not griping about Sonar's luv uv crashing, just informing. Like you I really only use Sonar and a few photo editing and drawing progs which all have huge graphical needs. I try to only use one at a time but sometimes I forget and wind up running 'em all at once. Sonar is usually the first to let me know not to do that.
 
As of late, tho, my audio drivers are stealing the show.