Jarek 🚲
It's been an Ontario standard to have roads owned and maintained by regions or counties as secondary (here Haldimand County's road 49). That's been the case for several years. Most of the time it's not really noticeable since roads tend to connect, but at natural boundaries like lakeshores you would see this happen.

Personally I don't think it's a great guideline to keep blindly, but that's a much larger conversation if you want to have it. See https://wiki.openstreetmap.org/wiki/Canada/Tagging_guidelines#Roads for the current wiki guidelines.