Stumped by a custom NSView bindings behavior

FROM : Steve Cronin
DATE : Fri Aug 31 09:11:15 2007

Folks;

This is the most complex Cocoa issue I've ever had to ask about!
I hope I can get the question stated well enough for a cogent 
response...

I have a custom NSView, MyCoolView, that allows me to create a 
configurable display of an array of images.
NOTE:  I have MyCoolView working perfectly when I have only a single 
instance of it in my nib.
The problem is when I put a second instance of MyCoolView into the 
nib they both ALWAYS display the same array of images.
I use -exposeBinding in +initalize to facilitate interaction with 
MyCoolView.
+ (void)initialize
{
...
    [self exposeBinding:@"imagesArray"];
...
}
MyCoolView also has the appropriate -imagesArray and -setImagesArray.
[NOTE: setImagesArray is never called directly by me!]

Over in my AppDelegate I have 2 outlets (coolView1 and coolView2) 
which are connected to the 2 instances of MyCoolView which are in the 
nib.
At various time I want to be able to display different arrays of 
images in each of these.
- (void)awakeFromNib
{
...
    [coolView1 bind:@"imagesArray" toObject:self 
withKeyPath:@"imgArray1" options:nil];
    [coolView2 bind:@"imagesArray" toObject:self 
withKeyPath:@"imgArray2" options:nil];
...
}
The AppDelegate also has the requisite setters and getters for 
imgArray1 and imgArray2 and I always use them.
And therein is the issue!!!

When I perform a [[NSApp delegate] setImgArray1:xyz] this spawns the 
expected call to the correct instance of MyCoolView -setImagesArray: 
and all is well with coolView1.

BUT if I immediately do NSLog(@"CoolView2's imageArray = %@",
[coolView2 imagesArray]) it has the values xyz!
And sure enough if I display coolView2 it displays the images in xyz.
I never see a call made to coolView2's instance of MyCoolView -
setImagesArray!

Conversely if I perform [[NSApp delegate setImgArray2:abc] the 
expected call to [CoolView setImagesArray:] is made but now 
[coolView1 imagesArray] is abc.

I've spent the better part of 2 days trying to pin this down and I'm 
just stumped.
I'm to the point where my brain wants me to just dupe the class and 
create a MyCoolView2 class but my gut won't let me...
Anyone have any ideas or seen this before?

Thank-you for reading this far and ANY thoughts you might share!
Steve