Are CA.centerAt and CA.orHigher meant to work together?

[tankorsmash]

My intention here was to have a graph centered around 1.0, but have the ranges go from 0.5 to 1.5 to begin, which works.

The issue is that when I've got a datapoint, say 1.8, the linechart is off-screen. I'd expect the chart to expand to include 1.8, instead of stopping at 1.5.

CA.domain
    [ CA.lowest 0.5 CA.orLower
    , CA.highest 1.5 CA.orHigher
    , CA.centerAt 1.0
    ]

The behaviour seems to be more like it's starting the initial bounds of the range, but not updating the bounds of the new data, after the data changes.