Seems to be an “S” thread
Each Multi Patch can hold 16 different patches. But there are indeed two kinds of Multi Patches insided the Virus TI.
The first 16 (1 - 16) Multi Patches contain 16 patches, which are independent from the patches in the banks A-Z. You can directly dial in what you want and create patches or you can copy a patch from the banks and tweak it as much you want, without changing the “original” patch.
Tho other Multi Patches (17 …) are only “links” to patches in the patch memory. If you change the patch in your Multi Patch it changes the original patch too. And vice versa. If you change the “real” patch, your Multi Patch will be changed also.
The reason for this is in the history of the Virus series. Since a software update, those first 16 Multi Patches have been added, to provide a flexible patch twiddling without destroying other patches.