How to bookmark Unread posts in specific fora

When I use the “Show unread posts since last visit”, which looks like this

it gives me absolutely every new post from anywhere on this board, including foreign language boards etc. I want only the unread posts in the two products I have, CIS and CPM. But when I try this

board 125.0 being the CIS, or this

board 229.0 being the CPM, it doesn’t give me any posts in the sub-fora associated with it.

Can someone help me to construct a command (one for each would be fine, one for both would be great) that gives me Unread posts for only CIS and CPM?


So is the answer:

A. Nobody knows


B. Not possible