Hi @aboyette 
You have asked your question in a global community of Canvas users who only have access to their own accounts and courses, so are unlikely to be able to answer your school-specific question.
Most schools use an integration between Canvas and the school's student information system to manage Canvas enrollments, and this will work differently at every school. I can tell you that at our school our integration runs every hour at the 50 minute mark. I suspect your is very similar - it is almost an industry standard. I think that by the time you read this answer, you're enrollments will already be sorted out.
If not, I found the following information and contact link on the St. Johns website that should be helpful for you.
For more information on distance learning contact Jack Hall, Director of eLearning (386) 312-4077
distancelearning@sjrstate.edu
Good luck with this,
Kelley
