On your local machine
Press the Windows Key + R
Type in %appdata% and press enter.
Open the .minecraft folder and then enter the saves folder.
Find your save and drag the folder to your desktop or another known directory.
Rename the world so you can identify it later. If you have more than one world, this helps you keep track of which is which.
Stop your game server
Then using an FTP client, upload the contents of the file you saved from single player to the Worlds file on the server side.
Then save the changes, and press the "Start" in the top right corner of your control panel!
If you have any issues, if you can save the world file, and send it to us in a zip file in a support ticket, we can upload it for you!
Have you tried looking up any config changes that are possible for the mod, or perhaps try running a destroy wild dinos admin command to see if that will stop them from spawning further?
You should be able to edit the serverconfig.xml file via FTP, use Notepad++ and CTRL=F to search, then find the EAC option and set it to false, save the file, and then start the server using the 'Start' button in the top right corner. Please submit a ticket if you are still having issue!
Please submit a support ticket, and in that ticket please include the world you are trying to upload in a Zip file as an attachment to the ticket. We will take a look at it and get it uploaded for you!