No, you don't need to. Sometimes it takes a while for the info to be passed down regarding your IVA. Speak to your IP and ask them to sort this out. You have nothing to worry about.
Sharing from experiences of dealing with debt
The greatness of a man is not in how much wealth he acquires, but in his integrity and his ability to affect those around him positively.
Bob Marley. http://kallis3.blogs.iva.co.uk
One of the best things I remember from when we started the IVAs was sending off all those begging letters to our IP every moth until they stopped. If I recognised the return address on the envelope I didn't even open them.