Misinformation seems to be rife from certain quarters of late. It could be an error at either end: the IVA firm or the creditor ( at either you could have just been speaking to a call handler with little access to the facts ).
You are not with CF, by any chance, are you ?
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