Weird volumes on Macbook

[CallMeAlan]

I have an elderly Macbook, purchased used not long ago (Macbook Pro Retina 13 inch late 2013, 121 GB SSD)
I'm seeing these volumes in Disk Utility:
1: Macintosh HD
2: Macintosh HD - Data
3: Macintosh HD - Data

#1 has Used 11.26 GB, Other Volumes 81.76 GB, Free 28.11 GB
#2 has Used 73.75 GB, Other Volumes 19.27 GB, Free 28.11 GB
#3 has Used 4.05 GB, Other Volumes 88.96 GB, Free 28.11 GB

As you can see, all three show the same Used figure, but none of the other figures seem to add up.

What's going on do you think? Anything I can do to fix?

 

[FreakinEurekan]

The extra “Macintosh HD - Data” is a result of improperly erasing/reinstalling at some point in the past. “Probably” you can just delete the #3 partition and be fine - I’d make sure you have a backup just in case, of course. Worst case, do a full erase so that the volumes are set up properly, and then migrate your data from the backup.

As you can see, all three show the same Used figure, but none of the other figures seem to add up

I have no idea what you’re referring to there. Each has a distinct Used figure, and the Other Volumes figure accounts for the other two plus hidden system volumes. That looks fine to me. All 3 volumes are sharing the same Container.