duplicated page title

I was trying to set a breadcrumb for nodes of a specific node type using breadcrumb for nodes, but it seem that I can't have the page title included if I don't check "Append page title", which seems fine, but the problem is that the view page that I also set a breadcrumb, got the duplicated page titles.

For example, I got a view page showing all nodes based on the node type "about us", such as a node "corporate history". The breadcrumb of that node is: Home> about us. If I check append page title, it shows Home > about us > corproate history, which is great. But the view page "about us", which should show all nodes of content type "about us", got the breadcrumb like this:

Home > about us > about us

I was wondering if someone could tell me how to fix this.

Many thanks!