I initially had a problem,when I first bought and tried to use the Tapes Tubes and Transistors bundle,where only the 32 bit stereo version of the Kramer Tape would show,and no 64 bit was to be found.
I then got support to help me go to the registry:HKEY_CURRENT_USER \ Software\ Cakewalk VSTx64 \ Inventory,and delete any waves entries,relaunch Sonar,scan,well this didn't work,but while I was in the registry,I noticed the 64 bit Kramer Tape was in a list of "disabled"plugs[but Sonars plugin manager DID NOT show this.
So I deleted the disabled entry,the 64 sereo version showed,but Iv'e since gone on to spend stupid amounts of money,and not had another problem[fingers VERY crossed].
As far as Sonar always having your issue,thats a weird one,though I did get told that "this happens in some Sonar setups" that was all,and even though their fix didn't work,I was able to luckilly figure it,sorry this doesn't really help much,but that was my experience.
Bob