Settings menu onchange variable handling

Your issue is you're not defining name locally, so it's a global variable and just ends up filled with the last value you set it to. If you change:

data = getDataStreams();
    Object.keys(data).forEach(function(k){
      name = data[k].description.split(" / ")[0];

to

data = getDataStreams();
    Object.keys(data).forEach(function(k){
      var  name = data[k].description.split(" / ")[0];

Then name ends up defined locally in the function defined inside forEach, so each key in data has its own version of name set.