The transmission of information through JSON within HTML data attribute

UPDATE - solution provided in the latest comment below.

I've encountered a peculiar issue while attempting to transfer and retrieve JSON data through a hidden variable. Despite intense scrutiny and exhaustive searches, I remain stumped as to why this problem persists. It's frustratingly elusive, but I'm convinced it's just a minor oversight on my part:

  1. Line 504 & 508 display the correct data (with the exception of the description field which was altered), yet line 509 reveals an extra object under _attachments that is absent in the prior two lines. Why is that?
  2. On line 509, there's a discrepancy between the header line description text and the body description text - the latter being accurate.

The discrepancies observed in Chromium are mirrored in Firefox. Referencing the code snippet and console logs below:

503 var pp = $("#new-event-page").find("input[name=event_data]").val();
504 console.log(pp);
505 // comment
506 var paramx = JSON.parse(pp);
507 //comment
508 console.log(JSON.stringify(paramx));
509 console.log(paramx);

Here's how the console log output appears after some manual formatting:

testa.js:504--{"name":"Untitled-1369464011",
               "description":"Previously added image - only this text is updated",
               "occurred":"2013-05-25",
               "group":"empty",
               "category":"empty",
               "_attachments":{"globe.png":{"content_type":"image/png",
                                            "digest":"md5d8ba0496f16bdf74d6310432abf2a530"}},
                "_id":"0C1CA0F4-2DF4-46F2-9D35-415674D6452A",
                "_rev":"5-1d108457b606cc4388160ca46ffefbbf"}
testa.js:508--{"name":"Untitled-1369464011",
               "description":"Previously added image - only this text is updated",
               "occurred":"2013-05-25",
               "group":"empty",
               "category":"empty",
               "_attachments":{"globe.png":{"content_type":"image/png",
               "digest":"md5-d8ba0496f16bdf74d6310432abf2a530"}},
               "_id":"0C1CA0F4-2DF4-46F2-9D35-415674D6452A",
               "_rev":"5-1d108457b606cc4388160ca46ffefbbf"}
testa.js:509--Object {name: "Untitled-1369464011", description: "Previously added image - only this text is updated", occurred: "2013-05-25", group: "empty", category: "empty"…}
    _attachments: Object
       globe.png: Object
          content_type: "image/png"
          __proto__: Object
       opAAAAAElFTkSuQmCC: Object
          content_type: undefined
          __proto__: Object
     __proto__: Object
     _id: "0C1CA0F4-2DF4-46F2-9D35-415674D6452A"
     _rev: "6-001ee0c89c5b9dbe2b06e5b926ad446d"
     category: "empty"
     description: "Previously added image - only this text is updated - revised"
     group: "empty"
     name: "Untitled-1369464011"
     occurred: "2013-05-25"
     __proto__: Object
javascriptjson

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