Error in the featured products grid - testament theme

[weloveplants]

Hi! I'm using the Testament theme. When i add the featured products section, the products come all among each other instead of side by side.
And at the bottom there is a weird black bar. Can someone help me?

My site is www.weloveplants.nl

[IrisE]

Hey @weloveplants,

Iris here from Shopify Support, I answered your question in Dutch in your other post. Just in case you were not aware, for questions in English, it is properly easier to consult our English Forum, as this is read and answered by a much larger group than here in the Dutch Forum. 

Or alternatively, post in the Design Forum with lots of contexts, these members are very knowledgeable about theme related questions.

Kind regards,