Disparity in ranges?

My MFM advised that my fasting numbers should be under 90, 1 hour after eating should be under 120, and 2 hours after should be under 140

I’ve seen the 1 hour and 2 hour switched for a lot of people here and in literature online. I’m wondering if anybody knows why there seems to be a disparity in levels?

All of my 1 hours have been under 140, but they aren’t always under 120 which makes me feel like I’m failing 🙃.

My fasting numbers have never been under 90 so I’m assuming medication is in my future regardless.