Hi, DennisL and welcome
Yep, that's normal. I set 1.52 for RAM and get 1.536. That's apparently the normal tolerance, which is likely in either the setting or sensor and most likely some of both. The same applies to Vccin, Vcore, etc. They'll be close, but only within .02v or so. More variation with load and temperature is also normal.
With Asus boards, these small variations are usually safe. The only time we need to be overly concerned is when overclocking and running voltages near the top end. Then it's better to measure ProbeIt points with a multimeter rather than rely on BIOS settings or the sensors. With your settings and no overclock, you're far from that point.
Jeff