Markup and garbled text of jypnb

HI

If I open jupyter notebook  something.jpynb , it opens as html marked up file vs a neat boxes in jupyter notebook page. How do I get this to work? I have anaconda installed.
 

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Your name:\n",
    "\n",
    "<pre> Enter your name here</pre>\n",
    "\n",
    "### Collaborators:\n",
    "\n",
    "<pre> Enter the name of the people you worked with if any</pre>\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "import matplotlib\n",
    "import matplotlib.pyplot as plt\n",
    "import numpy as np\n",
    "import pandas as pd"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Markdown referece can be found here:\n",
    "