DS planning board manual drag over 7 mnths with CDP

Hi,

I am trying to manually drag an order on the DS Planning board From June 2014 back to Oct 2013, so thats about 8 months.

This is with characteristic based planning, so I am trying to drag it to its correct block that links to its characterisic.

I keep getting no scheduling message (settings set to "consider block planning")

If I put the setting to IGNORE block planning, I can drag it anywhere.
And if I use IGNORE block planning, I can drag it back a few months - eg to May 2014, and then from the middle of March it seems to work.

So I can drag the order from May back to October - so thats about 7 months.

I am wondering if I have set some kind of random limit between 7 and 8 months where dragging doesnt work?

The pegging req is also in June.

I have the PPDS horizon set at 400 days, so way into the future to allow this (Initially I thought this may be the issue)

I am opening up a year forward in the DS planning board.

Any tips on how to get this to work, or wether there is some kind of time barrier on what can work.

Thanks!
John