That was my thought too, but they didn't seem to budge when I asked about it. If you just grind this practice test you shouldn't have any issues.

I moved to NJ from Ontario 1.5 years ago and transferred my license. I booked an "out of state transfer" appointment originally and they gave me a permit to come back and write the written test. After I wrote the written test, they waived the road test and gave me the full license.

I don't know if "out of state" was the correct type of appointment to book originally (they mentioned it means from a different state, not from Canada), so you might just have to book a permit appointment and show them your Canadian DL. Wasn't too bad of a process though.