Peculiar Foreach Keying Glitch (Cycles only once as 'key')

function nenscript_load_marker($marker=NULL)
{
    global $nen;

    if(is_null($marker))
        $marker=false;
    if($marker===false)
        $marker='markup';
    $pattern=nenscript_list_ini_load(nenscript_resolve('{{nen::ver}}/{{nen::pcre}}/'.$marker.'/pattern.ini'),"\r\n",'file','temp_pattern');
    $replace=nenscript_list_ini_load(nenscript_resolve('{{nen::ver}}/{{nen::pcre}}/'.$marker.'/replace.ini'),"\r\n",'file','temp_replace');
    $pattern2=array();
    $replace2=array();

    echo '<h1>marker('.htmlentities(count($pattern)).':'.htmlentities(count($replace)).'):"<tt>'.htmlentities($marker).'</tt>"</h1>';

    foreach($pattern as $stroke => $value)
    {
        if(preg_match('/\/(.*)\//',$pattern[$stroke],$matches))
            if($matches[0]===$pattern[$stroke])
            {
                if(isset($replace[$stroke]))
                {
                    $pattern2[$stroke]=$pattern[$stroke];
                    $replace2[$stroke]=$replace[$stroke];
                    echo '<h1>pattern('.htmlentities($stroke).'):"<tt>'.htmlentities($pattern2[$stroke]).'</tt>"</h1>';
                    echo '<h1>replace('.htmlentities($stroke).'):"<tt>'.htmlentities($replace2[$stroke]).'</tt>"</h1>';

                }
            }
    }
    return array('pattern' => $pattern2, 'replace' => $replace2);
}

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marker(5:5):"initial"
marker(4:4):"verily"
pattern(key):"/\[\+\](.*) \-\- (.*)\[\/\+\]/"
replace(key):" <tr><td align="center" valign="top">$1</td><td align="left" valign="top" min-width="80%"><tt>-- $2</tt></td></tr>"
marker(6:6):"media"
pattern(key):"/\[\+\](.*) \-\- (.*)\[\/\+\]/"
replace(key):" <tr><td align="center" valign="top">$1</td><td align="left" valign="top" min-width="80%"><tt>-- $2</tt></td></tr>"
marker(16:16):"neinstar"
pattern(key):"/\[(?P<tag>vid)=\"([^"]+)\"(( ([A-Za-z0-9_]+)((="([^"])"){0,1}))*)(\](((?:(?!\[(?P=tag)\]).)+?){0,1})\[\/(?P=tag)\]| \/\])/"
replace(key):"[<][tbl][row][col][<]#[url="$2"]$2[/url][>][/col][/row][row][col]<video onload="siren_pause(this);siren_pause(this);" onclick="siren_pause(this);" style="max-width: 80%; width: 320px;"$3><source src="$2"></video>[/col][/row][row][col]$10[/col][/row][/tbl][>]"
marker(7:7):"markup"
pattern(key):"/(\[neinstar.logo company\])/"
replace(key):"/network666/originals/site/Logo.png"
marker(20:20):"bbcode"
pattern(key):"/(\[neinstar.logo company\])/"
replace(key):"/network666/originals/site/Logo.png"
marker(2:2):"images"
pattern(key):"/\[(col)(( ([a-z]+)="([^"]*)"(( ([a-z]+)="([^"]*)")*)){0,1})\](((?:(?!\[col(=|\]| )).)+?){0,1})\[\/col\]/"
replace(key):"<td$3>$10</td>"
marker(1:1):"block"
pattern(key):"/\[(col)(( ([a-z]+)="([^"]*)"(( ([a-z]+)="([^"]*)")*)){0,1})\](((?:(?!\[col(=|\]| )).)+?){0,1})\[\/col\]/"
replace(key):"<td$3>$10</td>"
marker(2:2):"linestyle"
pattern(key):"/\[(col)(( ([a-z]+)="([^"]*)"(( ([a-z]+)="([^"]*)")*)){0,1})\](((?:(?!\[col(=|\]| )).)+?){0,1})\[\/col\]/"
replace(key):"<td$3>$10</td>"
marker(3:3):"final"
pattern(key):"/\[\<\]\#(((?:(?!(\[\<\])|(\[\>\])).)+?){0,1})\[\>\]/"
replace(key):"<center><h1><font class="stress" face="courier new">$1</font></h1></center>"