ok I figured out the fix, the comments were getting deleted because facebook made a change to the API
Disregard the first post changes and change:
line 39
if (is_array($locComments) && is_array($locComments['data']))
TO:
if (is_array($locComments) && is_array($locComments['comments']['data']))
and line 43
$helper->import($comments['data'], $this->importMode);
TO:
$helper->import($comments['comments']['data'], $this->importMode);