Window Swapping Causes UI Bugs in WoW

[Nitemaru]

Hell-o there.

I have an issue whenever i switch windows (PiP or 2 monitors alike) my UI gets messy.
Fat outline when using Elvui, Font changes when using Zperl or no UI addon and so on.
Party frames out of place...
When i dont use a Positioning command and i simply have all my windows unchanged switching simply with alt-tab all is good. so it must be a code thing right?? O,.o

//-----------------------------------------------------------
// COMMAND TO SET THE POSITION AND SIZE OF A WINDOW.
//-----------------------------------------------------------
<Command PositionAndSize>
    <TargetWin %1%>
        <SetWinRect %2% %3% %4% %5%>
//       <SetWinPos %2% %3%>     (TRIED BOTH TO SEE IF IT MAKES A DIF.)
//       <SetWinSize %4% %5%>

//-----------------------------------------------------
//    WINDOW POSITIONING
//             Resolution - 1680 x 1050 
//-----------------------------------------------------


<Hotkey Alt Ctrl Numpad1>


<PositionAndSize WoW1 0 0 1680 1050>
<PositionAndSize WoW2 -1680 0 840 512>
<PositionAndSize WoW3 -1680 512 840 512>
<PositionAndSize WoW4 -840 0 840 512>
<PositionAndSize WoW5 -840 512 840 512>

and PiP

<Command SetPip>     
  <TargetWin %2%>
        <SetWinSize 250 150>
        <SetWinPos 0 0>
 <TargetWin %3%>
        <SetWinSize 250 150>
        <SetWinPos 0 150>
 <TargetWin %4%>
        <SetWinSize 250 150>
        <SetWinPos 0 300>
 <TargetWin %5%>
        <SetWinSize 250 150>
        <SetWinPos 250 0>
  <TargetWin %1%>
        <SetWinPos 0 0>
        <SetWinSize 1680 1050>
    <TargetWin %5%>
        <SetForegroundWin>
        <UpdateWin>
    <TargetWin %4%>
        <SetForegroundWin>
        <UpdateWin>
    <TargetWin %3%>
        <SetForegroundWin>
        <UpdateWin>
    <TargetWin %2%>
        <SetForegroundWin>
        <UpdateWin>
    <TargetWin %1%>
        <SetWinRegion 0 0 500 150>
    <SetWinRegion 0 0 250 450>
        <SetForegroundWin>