Alter and correct existing functionality

I operate an opensource system called EmonCMS to record energy usage for a client ([login to view URL]) EmonCMS uses the following work flow: 1. data from a remote energy meter posts data to EmonCMS using JSON in the URL String (this is called and input in EmonCMS) 2. EmonCMS then allow for the editing of the incoming values and is then exposed to a dashboard (this is called a feed in EmonCMS, each feed has its own table in mysql) 3. a feed is then used in displaying data on graphs and gauges. I need to alter the following functionality to the system: 1. I currently have a monthly feed option that needs to grow from the first day of the month to the datetime now. 2. I currently have a feed option to produce a monthly and daily reading from an energy meter which works well but when I add the input from a second meter the outputted values are unexpected, I need the freelancer to investigate and correct the system where necessary. 3. A graph containing some clickable controls (zoom, move graph etc) are not responsive on one of the website pages, I need the freelancer to investigate and correct. 4. On two different styles of graphs, (raw data and multigraph) shows a timeline across the bottom, when zoomed in it drops the date and only shows the time, I need the freelancer to modifiy the graph so the date/day being viewed is displayed even when zoomed in on to a small time scale. Please see attached word document for more details. Regards, Chris