Help: Where does iDisplayLength get its default value and why my configuration is ignored?

Hello,

I'm a first timer here, so I apologize in advance if I started this topic in a wrong way. Also, congratulations for this fine library, it has great features!

I searched the whole forum for this but unfortunately I did not find (a proper) answer for this.

Some information before explaining in depth the entire issue:
- I am using DataTables with server-side processing, using Ajax calls to fetch the data from DB and process that data before returning through Json to the client-side (I will post my configuration of client-side below);
- I am using the variables iDisplayStart and iDisplayLength in the server-side process to limit and fetch the appropriate data;
- I am using in my client-side configuration both Infinite Scrolling AND Scroller features, although I have tried all 3 possible ways to do what I need (just with I.S., just with Scroller, and using both features at the same time).

My current configuration in client-side (I will post only the part relative to this issue, since my code is actually quite long and has a lot of stuff included):

var oTable = jQuery('#myDataTable').dataTable({
            "sServerMethod": "POST",
            "bDestroy": true,
            "bServerSide": true,
            "bJQueryUI": true,
            "sAjaxSource": "AjaxHandlerProcessor",
            "bDeferRender": true,
            "bProcessing": true,
            //Infinite Scrolling
            "bScrollInfinite": true,
            "bScrollCollapse": true,
            "iScrollLoadGap": 50,
            "sScrollY": "490px",
            "sScrollX": "120%",
            "iDisplayLength": 50,
            "sDom": '<"H"fr>tS<"F"i>',
            "aaSorting": [[0, "asc"]],
             (...)

I have tried configuring the iDisplayLength, as you can see, setting it to 50, however for some reason when I fetch the value passed by the Ajax Request it always shows me the value 225. Where is it getting this value? If I remove from configuration the iDisplayLength option, it still gives me this value and it is messing up (I believe) the results.

Also, I believe this is the key to my main problem: when I use the scrolling bar with Infinite Scrolling, somehow after a fewa Ajax calls my records are replicated X times (in chunks).

Can anyone help me please? Unfortunately I cannot create a live example for my problem.

If someone requires more code (or even from my server-side, please say so and I'll do my best to give it.

Thanks in advance and best regards.