limited destinations on free version siteorigin google maps?

hi
i’am dutch so please forgive my english.
i i like to make a route for for visiting art and crafts ateliers in our village
i think we have 20 ateliers in our village
when i fill in the destinations it go’s well till number 9 then the markers are gone and i see only a global version of our village

like to hear from you

URL: http://www.kunstatelierroute.nl/overzicht-route/