Activity anterior aparece na atual

protected void onCreate(Bundle icicle) 
	{
    	super.onCreate(icicle);

    	Window window = getWindow();
    	window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    	setContentView(R.layout.inicial);
    	
       Button lerProduto = (Button) findViewById(R.id.btnLerProduto);
       
       lerProduto.setOnClickListener(new OnClickListener() {
		
		public void onClick(View arg0) {
			
			startActivity(new Intent(InicialActivity.this, CaptureActivity.class));
			
		}
	});
    
       
    	
	}

<activity android:name=".InicialActivity"  android:theme="@android:style/Theme.NoTitleBar" android:screenOrientation="landscape"  android:configChanges="orientation" >
             <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>