CF always do this and try to extort more from you by quoting the figure for 'settlement', rather than a full and final offer.
Settlement is paying the balance of the original debt and fees. A full and final offer is offering a lump sum based on agreed IVA payments remaining. They are obliged to put such an offer to creditors.
They do not suggest the F&F offer amount -- that is for you to do.
Base your offer on number of payments left x £198 ( you have to add 12 payments if you are a homeowner, in lieu of equity release).
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014 http://foggy.blogs.iva.co.uk