Try this:
edit postbit and postbit_legacy templates, search for (which should be the very end of those templates):
Code:
<div class="windowbg">
<if condition="$post['editlink']"><a id="btn" href="$post[editlink]">$vbphrase[edit]</a></if>
<if condition="$post['replylink']"><a id="btn" href="$post[replylink]">$vbphrase[reply]</a></if>
</div>
and replace with
Code:
<div class="windowbg" align="right">
<if condition="$template_hook[postbit_controls]">$template_hook[postbit_controls]</if>
<if condition="$post['editlink']"><a id="btn" href="$post[editlink]">$vbphrase[edit]</a></if>
<if condition="$post['replylink']"><a id="btn" href="$post[replylink]">$vbphrase[reply]</a></if>
</div>
<if condition="$template_hook[postbit_end]">$template_hook[postbit_end]</if>