hey jeff,
there are actually 2 things influencing the space above the post.
the first would be the easyblog header - if you want to remove this one just add the following code to your template's custom css file:

#ezblog-head {

display: none;

}

after applying this you'll still see space on top, that one is coming (next to the space at the sides and bottom) from your current joomla template.
if you wish to get rid of this as well use this code:

.tm-system-white .tm-content {

padding: 0;

}

with both codes in place the whole surrounding space will be gone. hope that helps and have a nice day