Recaptcha form being outsmarted?

I have a contact form I wrote that uses the Re-Captcha system. I've posted the OOP Recaptcha code I wrote (I took their "sample code" they offer and converted it to OOP style). The form is located at
http://www.mechanicmatt.com/Contact+Me-p67.html

Lately I've been receiving submissions from the form. I have personally tried to submit this form without using valid re-captcha responses but I keep getting stopped by my code. Have spam bots found a way to defeat the re-captcha system, does my code have an issue, or are these people manually submitting my form?

Below is the code from a large class I wrote that I just copied/pasted the functions used

public function processRequest($data) {
		if (intval($data["doContact"]) == 1) {
			$this->contactMe($data);
		} else {}
	}
 
	private function contactMe($data) {
		if (trim($data["email"]) != "") {
			header("Location: /Access+Denied-p71.html");
		}
		else {
			$recaptcha = new recaptcha();
			$error = true;
 
			if ($data["recaptcha_response_field"]) {
				$resp = $recaptcha->recaptcha_check_answer (
							$_SERVER["REMOTE_ADDR"],
							$data["recaptcha_challenge_field"],
							$data["recaptcha_response_field"]
						);
 
				if ($resp->is_valid === true) {
					$template = $this->fileContents("includes/emailTemplate.php");
					$message = sprintf($template, $data["contactTitle"], $data["contactName"], $data["contactCompany"], $data["contactWebsite"], $data["contactEmail"], $data["contactCategory"], $data["contactCategoryOther"], $data["contactDetail"]);
					$error = false;
				} else {
					$_SESSION["postContactForm"] = $data;
					$_SESSION["postContactForm"]["error"] = $resp->error;
					$error = true;
				}
			}
			else {
				$error = true;
			}
 
			if ($error === true) {
				header("Location: /Contact+Me-p67.html");
				die();
			}
			else {
				$this->sendMail($data["contactEmail"], "Contact Form Submission", $message);
				header("Location: /Portfolio+Home-p1.html");
			}
		}
	}
 
	function sendMail($from, $subject = "", $message = "", $cc = true, $html = true) {
 
		$eol = "\r\n";
 
		$headers = "From: " . $from . $eol;
		$headers .= "Reply-To: " . $from . $eol;
		$headers .= "MIME-Version: 1.0" . $eol;
 
		if ($subject == "") {
			$subject = $this->config["siteTitle"] . " Contact";
		} else {}
 
		if ($message == "") {
			$message = "Invalid Use!";
		} else {}
 
		if ($cc == true) {
			$headers .= "CC: " . $from . $eol;
			$message = "<b>Below is a copy of the email you submitted from " . $this->config["siteTitle"] . ":</b><br /><br />" . $message;
		} else {}
 
		if ($html == true) {
			$headers .= "Content-Type: text/html; charset=iso-8859-1" . $eol;
			$headers .= "Content-Transfer-Encoding: 8bit" . $eol;
		}
		else {
			$headers .= "Content-Type: text/plain; charset=iso-8859-1" . $eol;
			$headers .= "Content-Transfer-Encoding: 8bit" . $eol;
		}
 
		if (!mail($this->config["adminEmail"], stripslashes($subject), stripslashes($message), stripslashes($headers))) {
			die("problem mailing");
		} else {}
	}

Select allOpen in new window

contactMe.php.txt
index.php.txt
Init.php.txt
recaptcha.php.txt