@kino Try changing the date format in Custom field, change "Format" to %a. %e %B %Y , resave the subscriber data and check again. Hope this helps
For the field containing image path, this is a normal behaviour to display just the path. The acyba code is written to fetch the value that is stored in the field. To display the actual image you need to use the HTML image tag by switching to Source code (From editor tool bar) and use the image tag as follows
<img src="{subtag:custom-field-with-imagepath}" />