Open up the FTP site list and compare the site entries, particularly the Misc tab where you can override the LIST command used for the server.
It looks like the server is returning directory listings in a format that's confusing Opus but if all the accounts are talking to the same server then the problem is almost certainly in the FTP site list, and it might be that the wrong LIST command has been specified. (Normally you don't have to specify one at all, just turn on "use sever-specific LIST command" instead.)