Both use anonymous login. If I connect to either of them in a lister, and then try to open the other, I am still at the directory defined for the first connection.
Thanks. The leading / makes the difference - without it, still connects and navigates to the initial directory OK on the first connection, but then has the problem when connecting to the other.
Without the / to specify the root folder, the path would be relative to the current folder. (On first connection, that might be the root, or the user's home folder, or something else, depending on how the site is configured on the server side. But when already connected it would be wherever you had navigated to.)