In Ontario, no.
Well to clarify, they have 6 months to charge you with an offence. But they can't charge you with something else because you plead not guilty to one ticket. So even if the officer notes talk about a bunch of other things you did wrong, and these get read at your trial, they can not charge you with any of those.
I am not a lawyer and I am not a paralegal and I do not give legal advice.
All statements made are my opinion only.