Not sure if you have to but I believe you want <Else IF yada yada after your first if statement.

Here's what I use maybe it can give you some idea's or whatever. I do use a ftl setup so doesnt matter which screen im on. If i hit the spot on any the screen it will heal or whatever i have it set on.

Code:
//--------------------------------------------------------------
//Leftclick Mouse over healing
//--------------------------------------------------------------

<Hotkey LButton>

    //------------------------------------------------------
    // Bore
    // -----------------------------------------------------
        //    /cast [mod:LCtrl,target=Bore] lesser healing wave
        //    /cast [mod:LShift,target=Bore] healing wave
        //    /cast [mod:LAlt,target=Bore] Riptide
        //    /cast [target=Bore] Chain Heal
    //------------------------------------------------------
    // Top half of unit frame
    //------------------------------------------------------

    <If MouseIsOverWindowRect WoW1 768 1049 74 68>
        <SendLabel w2>
            <Key LShift G>
    <Else If MouseIsOverWindowRect WoW2 768 1049 74 68>
        <SendLabel w2>
            <Key LShift G>
    <Else If MouseIsOverWindowRect WoW3 768 1049 74 68>
        <SendLabel w2>
            <Key LShift G>
    <Else If MouseIsOverWindowRect WoW4 768 1049 74 68>
        <SendLabel w2>
            <Key LShift G>
    <Else If MouseIsOverWindowRect WoW5 768 1049 74 68>
        <SendLabel w2>
            <Key LShift G>

    //------------------------------------------------------
    // Bottom half of unit frame
    //------------------------------------------------------
    
    <Else If MouseIsOverWindowRect WoW1 768 1134 74 66>
        <SendLabel w2>
            <Key G>
    <Else If MouseIsOverWindowRect WoW2 768 1134 74 66>
        <SendLabel w2>
            <Key G>
    <Else If MouseIsOverWindowRect WoW3 768 1134 74 66>
        <SendLabel w2>
            <Key G>
    <Else If MouseIsOverWindowRect WoW4 768 1134 74 66>
        <SendLabel w2>
            <Key G>
    <Else If MouseIsOverWindowRect WoW5 768 1134 74 66>
        <SendLabel w2>
            <Key G>

    //------------------------------------------------------
    //Sedi
    //    /cast [mod:LCtrl,target=Sedi] lesser healing wave
        //    /cast [mod:LShift,target=Sedi] healing wave
        //    /cast [mod:LAlt,target=Sedi] Riptide
        //    /cast [target=Sedi] Chain Heal
        //------------------------------------------------------
    // Top half of unit frame
    //------------------------------------------------------

    <Else If MouseIsOverWindowRect WoW1 846 1049 74 68>
        <SendLabel w2>
            <Key LShift T>
    <Else If MouseIsOverWindowRect WoW2 846 1049 74 68>
        <SendLabel w2>
            <Key LShift T>
    <Else If MouseIsOverWindowRect WoW3 846 1049 74 68>
        <SendLabel w2>
            <Key LShift T>
    <Else If MouseIsOverWindowRect WoW4 846 1049 74 68>
        <SendLabel w2>
            <Key LShift T>
    <Else If MouseIsOverWindowRect WoW5 846 1049 74 68>
        <SendLabel w2>
            <Key LShift T>

    //------------------------------------------------------
    // Bottom half of unit frame
    //------------------------------------------------------
    
    <Else If MouseIsOverWindowRect WoW1 846 1134 74 66>
        <SendLabel w2>
            <Key T>
    <Else If MouseIsOverWindowRect WoW2 846 1134 74 66>
        <SendLabel w2>
            <Key T>
    <Else If MouseIsOverWindowRect WoW3 846 1134 74 66>
        <SendLabel w2>
            <Key T>
    <Else If MouseIsOverWindowRect WoW4 846 1134 74 66>
        <SendLabel w2>
            <Key T>
    <Else If MouseIsOverWindowRect WoW5 846 1134 74 66>
        <SendLabel w2>
            <Key T>
Thats for 2 of my characters. I have a block like that for each one. For left, right, and middle click.
Then at the end of each click I have the normal mouse use. I do have my unit frames vertical so I use above the name for one thing and below for another.
Code:
<Else> //--Defaults mouse to normal when you dont click a predetermined cordinate
        <SendFocusWin>
            <ClickMouse Down %Trigger%> //--Use to allow mouse look with left click
<HotkeyUp LButton> //--Use to release left click when mouse looking
    <SendFocusWin>
        <ClickMouse Up %Trigger%>