Why is Current Capacity Higher than Full Charged Capacity?

I'm confused about something I'm seeing on many laptops. The Current Capacity, when the laptop is 100% charged, is higher than the "Full Charged Capacity" but is on par with the Designed Capacity. 

So, on my Latitude 7270:

Designed Capacity: 54994 mWh
Full Charged Capacity: 52250 mWh
Wear Level: 5%
Current Capacity: 54994

So, if my laptop is only capable of reaching 52250 mWh, why is it currently at 54,994? This isn't the only laptop where I've noticed this issue.