Summernote帖子以错误的方式转换实体

I've a problem when posting a summernote textarea.

If I write I <3 IT inside visual editor, and set it as bold, and switch to code editor view I see: <b>I &lt;3 IT</b>

All correct at this point.

But if I submit my form, in the destination page I get:

<b>I <3 IT</b>

So I can't encode, cause also < of bold are encoded.... so i'm stuck in this situation that break my use of the string passed in the second page for other usage!

Trying use CTRL-I in firefox to view soucecode html i see: <b>I <3 IT</b> so i think the problem is from submit of summernote logic?bug?

UPDATE: I know the problem! My textareas are dynamically added with a button "ADD NEW INPUT".

So when i post, I use a function to append text to form:

$("body").find(".mytextarea").each(function(index, element) {

        var testo = $(this).val();

        form.append($('<textarea class="hidden" name="textareas['+index+'][Testo]">'+ testo+'</textarea>') );


    });

form.submit();

In this way seem to be a problem! How can I fix that?