No, the CA2A was an update to the PC2A module. It also shipped with other plug-in formats.

Is it possible that the PC2A overwrote the CA2A in that I installed the PC2A after I installed the CA2A?

That is a possibility. I know that the CA2A install process renames the PC2ALevelingAmplifier_64.dll to PC2ALevelingAmplifier_64.old to get it out of the way. There could be some registry magic too, I am not sure. I believe the scanner looks for PC modules after your VST scan paths so it could be overlaying the CA2A entry with the PC2A (if you are seeing the PC2A in your PC list). You could try renaming the PC2A dll or just run the CA2A installer again.

I uninstalled both and re-installed the CA2A only and it still doesn't show in PC. strange..

I see a tech support call in your future

No please not that!!!

After reading your V-Vocal/R-Mix thread I am beginning to think these are the same thread with different names.

I posted the other one before I found out about the CA2A or I would have posted all 3 issues in one post.

It is hard to follow both threads. Which one do you want to work?

No CA2A here in S3... wot's, uh, the deal?