Not really! Almost everyone I know from Winnipeg ( 3--4 ppl) who added their spouse in between the application got their file transferred to Winnipeg. I guess this is now new protocol that ircc have in place.
Local visa offices calls these applications * A complex type* application.
Nothing to do with genuineness of relationship.
In my case my file was almost in last stage. Like both my spouse and mine eligibility passed. Criminality passed. Medical passed. BIL done for spouse, all in central office and just last month they transferred it to Winnipeg.
Winnipeg says it's in queue to be assigned to an officer.