WPDM Directory Add-on, number of sub-category

Hello,
I have a problem, when i put [wpdm-archive] in my page, the caetgory and sub category are showing but if i have more than 6 sub-category the others are not showing.
I’m sorry for my bad english so i explain more : the sub-category 1 to 6 are visible but the 7 to 10 are not.
In the code i see the zone but in the css
.wpdm-pro .dropdown-menu there is position:absolute. If I delete it, i see all of the sub-category but everything move.

How can I fix that ?

Thank you