<p dir="auto">Seems like the HTML is appended twice to the phone viewer when a new challenge is loaded (see screen shot below). As soon as the exercise code is changed it is rendered correctly.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://cloud.githubusercontent.com/assets/1204339/11118913/f191e3e2-8945-11e5-8da3-7b91206f06a3.png"><img width="941" alt="screen shot 2015-11-12 at 13 57 22" src="https://cloud.githubusercontent.com/assets/1204339/11118913/f191e3e2-8945-11e5-8da3-7b91206f06a3.png" style="max-width: 100%;"></a></p>
<p dir="auto">Challenge <a href="http://www.freecodecamp.com/challenges/waypoint-line-up-form-elements-responsively-with-bootstrap" rel="nofollow">http://www.freecodecamp.com/challenges/waypoint-line-up-form-elements-responsively-with-bootstrap</a> has an issue.</p>
<p dir="auto">I think the problem is happening on all Waypoint pages; the device right side of the screen where the CatPhotoApp page displays the information is being displayed duplicated;</p>
<p dir="auto">Another point is that the HTML / CSS code is not completely displayed when the page is loaded, it is necessary to click or edit the code so that the code from the previous lesson is displayed correctly;</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://cloud.githubusercontent.com/assets/8672039/9483149/cbe9f67c-4b72-11e5-9b2a-698deaa06a4e.png"><img src="https://cloud.githubusercontent.com/assets/8672039/9483149/cbe9f67c-4b72-11e5-9b2a-698deaa06a4e.png" alt="duplicate" style="max-width: 100%;"></a></p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://cloud.githubusercontent.com/assets/8672039/9483184/285ff19a-4b73-11e5-8601-6c5fbb58215b.png"><img src="https://cloud.githubusercontent.com/assets/8672039/9483184/285ff19a-4b73-11e5-8601-6c5fbb58215b.png" alt="lost previous code" style="max-width: 100%;"></a></p>