Validity of DNS at time of registration for .ca

[Jo Shea - Danjo Creations]

We just discovered one of our client's .ca names was registered several
months ago with a wrong NS name - we put in ns1.xxxx instead of ns.xxxxx.
Now, in the past, if we typoed, the system would report back that it was an
invalid/inexistant name server. Does this not work with .ca names or did I
somehow miss seeing the warning? - or is it only for changes thru manage?
The nameservers are .com's.

Jo Shea
Danjo Creations