Phil - I agree not normal for what should be used.
I mean his result seems normal if he used the settings listed in the op. 90 Deg v-bit, 51% step over and .1 flat depth. If he used those settings, I would expect the ridge seen in the middle of the cut.
Sean, have you already run a circle-square-triangle calibration test? It’s hard to tell but it looks like your tool paths are not as fluid as they should be. Especially that circle in the center of the ‘O’.
A quick search for ‘calibration’ in the forum will provide you a wealth of information on troubleshooting.