I gave this another try last night. The posted recipe was a little ambiguous, but the cookbook contained a chart that clearly states “porridge – full cycle”, so I didn’t misinterpret the instructions. In order to control the cooking this time, I used the quick cycle, which is just heating without any soaking time.
I kept an eye on it, and when there was a little liquid left, I turned off the cooker. Rice was done. A few minutes later, pretty much all of the liquid disappeared, so I was back to the same results as I got the first time.
I’m giving up trying to make a creamy risotto in the rice cooker. Although not the texture I was shooting for, it’s still very tasty. This is another one of those “not worth the effort” attempts. In the future I’ll just let the rice cooker do its thing and just enjoy the finished product without the extra work.