1. Is there any statute about how long between offense and notification by summons?
2. What would be the fine/ penalty for something like this? (This did hapeen on the job so a bit concerned over any effect with my employer) It seemslike it should have been a minor ticket, why a summons?
2) Regular tickets need to be served within 30 days of the offence, hence why they're proceeding by summons. It doesn't necessarily mean they're treating the charge more seriously or seeking a higher fine.
When you show up on your first date, you don't have to go to trial. Speak with the Crown and request disclosure to see what the evidence against you is. You can then decide how you want to proceed.