Electricity Meter Question

Is anyone in the know about electricity meters?

In the animated GIF (which starts at reading 66148) should my meter jump like this between reading 66149 and 66150? I think it might not be over-reading due to a similar skip in the opposite direction that happens randomly on other digits but I can’t be sure and, according to an energy monitor I’ve tried, the reading is quite a bit above what it should be.