Post spacing not working

We have recently had a new theme on our website and everything works great except for post spacing isnt working

We would like to be able to place one link on each line with little space in between them a expamle that is near to what we want is: http://www.thefutureofrnb.com/tracks-the-catch-up, although the spacing is too big.
I know about removing the centre tags and the </p> tags and then we click html and it iss showing exactly how we want it…but..when we post it it looks like this: http://www.thefutureofrnb.com/16-02-11-tracks-2.
What do i need to do to fix it?