Wrong URL in monthly custom post type archive

Thanks for your great plugin.

I set the widget “archive(Custom posttype)”.
post type is “news”.
and I check that page and select “201608”.
it is moved to “https://mydomein/news/news/date/2016/08/”.
news is wrote twice.

I try to fix it with using “custom post rewrite”.
but nothing is changed.

it is shown correctly if I access “https://mydomein/news/date/2016/08/”

already use “custom post type permalink”.
if someone has a solution, advice me please.

Regards.

https://www.ads-software.com/plugins/custom-post-type-widgets/