Hi
in template manager — LAYOUTS Tab — edit your default layout and the middle block now is in this way
<blocks name="middle" colwidth="22" fixheight="1">
<block name="content-mass-top">content-mass-top</block>
<block name="content-mass-bottom">content-mass-bottom</block>
<block name="content-top" type="modules">content-top</block>
<block name="content-bottom" type="modules" style="raw">content-bot</block>
<block name="left-mass-top">left-mass-top</block>
<block name="left1">left</block>
<block name="left2">right</block>
</blocks>
to have the right position change the left1 to right1
<block name="right1">left</block>