Hi
I had suffered with same issue ( error message for cosigner telephone number and residency declaration ) for June 2017 form .
I had submit both form (July 2016 old form and June 2017 new form ) as CIC suggest to attach new form June 2017 with explanation letter and screen short for the error message.
Intresting.. Did you call CIC about this and they asked you to send both forms? wouldn't it be confusing as one says Not validated and other says "yes" with multiple barcode pages for both? I am surprised if they knew about this problem wouldnt it be a simple fix to correct the forms rather than asking us to mail them multiple forms of the same.