I found the problem (at least for me!)
When I made the image gallery path identical on both instances my problems cleared up. I now have 3 instances on the same page.
In my case
.....
$editor->ImageGalleryPath = "/Uploads";
......
....
$preeditor->ImageGalleryPath = "/Uploads";
......
....
$toplinkeditor->ImageGalleryPath = "/Uploads";
......
I hope this helps someone else,
Bernie
MAKO Web Sales
Sarasota's Only Certified PayPal Developer