php - Search query doesn't return desired results

I have kind of advanced search function. All works fine except oneAND LIKE .... There are two optionsA orA, *AB. I want when I chooseA to return results only which areA in database and when I chooseA, *AB to return results which are onlyA, *AB.

What is happening now is that when I chooseB, *AB it returns results which for both

A
A, *AB
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My form is with actionget. This is my query

    $couGe=($ge == "None") ? "" : "AND c.ge LIKE '".substr($ge, 0, 2)."%'";
    $active = ($this->showCouCancelled) ? "AND (c.active=1 OR c.active=7)" : "";
    $active = ($this->hideCouActive) ? "AND (c.active=1 OR c.active=3 OR c.active=4 OR c.active=7)" : "";
    $couName = ($cName) ? "AND course_title LIKE '%$cName%'" : "";
    $couDept = ($cDept) ? "AND s.dept='$cDeptArray[0]' AND s.dept_code='$cDeptArray[1]'" : "";

    $iRes = _SQLQuery("
                    SELECT DISTINCT c.id,s.dept,s.dept_code,c.course_title,c.active,s.year,s.sem,c.ge,c.course_type
                    FROM courses AS c, sections AS s, teachers as t, tea_sec_rel as tsr
                    WHERE s.course_id_rel=c.id AND $curYr $curSem $active $couName $couDept $psSearch $couGe
                    ORDER BY s.dept,s.dept_code");
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The html select option menu has

<select name="ge" id="ge">
   <option value="None">All</option>
   <option value="A">A</option>
   <option value="A, *AB">A, *AB</option>
</select>
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On the query this is the line which takege

$couGe=($ge == "None") ? "" : "AND c.ge LIKE '".substr($ge, 0, 2)."%'";
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When Ivar_dump($_GET['ge'] I see that I get what I choose. I'm very confused and any help is appreciated.