Anspress 4 b2: Images upload / insert

(1) I upload an image to a post. After the upload is finished, the image is automatically inserted in the post body. So what the “Insert” photo near the attachment mean ?

(2) Editing a post, i delete an image attachment (via the trashcan icon). After that the inline image is still show and an icon (broken ?) at the botton with hover “Download File”. What is that ? Also the image doesn’t really exist because open the image to a new window and resfreshing you get a 404. Something is wrong in all that, not sure what. Some cache ?

Thanks !