It's not a problem - it's by design that way because often there is not enough room to show all the description. You just happen to have really short descriptions so Use this code...
.g-owlcarousel-slideshow .g-owlcarousel .g-owlcarousel-content .g-owlcarousel-item-desc {
display: block
}
To create a custom CSS compatible with Gantry 5 please read this
http://docs.gantry.org/gantry5/tutorials/adding-a-custom-style-sheet
.
Remember to recompile CSS from base outline too.
Also I note that your subscription has expired - support does require that you have a current subscription.
Regards, Mark.