I did a work-around with JBridge, where the program processed the Antress VSTs, and then created wrapped-around .dll files. That remedied the problem, but since the Modern and Silver editions for the Compressor and Equalizer have different coloring, and they couldn't be separated since they both have the same file name, I was a bit annoyed.
I went back to the plugin manager in Cakewalk, and I removed the jbridge-related file folder paths from the scanning directory. I then resetted the database, and performed a full rescanning. The Antress VSTs went missing again, and I wondered if this was due to them being potentially corrupted or otherwise affected. So I deleted them from their folders, and X3 identified the 37 VSTs as missing. I then unzipped the file again to their former file locations, and the background scan ran again. The VSTs were not identified, and the total number of available VSTs remained the same.
I repeated this process again, and deleting the files registers in Sonar. It just doesn't add them to the database. So they're acknowledged, but not added. But when they're deleted, the deletion is recognized. The total number of available VSTs remains the same.
To think, I only have about 150.