True. Technically K2, SE and Bob's are supported for version 0.0.11 (Factorio 1.1), but not for version 0.0.12 (Factorio 2.0).
I have a version 0.1.0 of the mod that supports K2, SE, Bob's, SA and any other mod that adds belt tiers, but since I still want to add some small features (and I think there might be a small bug in 0.1.0), and K2, SE and Bob's have not updated to Factorio 2.0 yet, I decided to leave the compatibility message on the main page.
Let me know if you have a better idea, or if the incompatibilities are affecting earlier versions of the mod. (Or if said mods update to Factorio 2.0.)