there is a gap accully because the ad unit excute with message (post) in one variable. which I mean that (ad unit + post) is one block and sig data is another block. so if your post too short it's will shown like above.
you can solve this by using new version of this mod v7.0
add your ad units info then, in 'postbit' or/and 'postbit_lagecy' template
add where ever you want:
PHP Code:
<if condition="$post[postcount] == 1">$ain_adsense[xx]</if>
xx you ad unit id
best luck