MongoDB sharding cluster show wrong size

I created a mongodb cluster according to digitalocean's instructions. I sharded my database with the following command:

sh.shardCollection("database.Collection", {"userId": 1})

With the command

show dbs

I get the following output

database    24.84 GiB

With the command

db.Collection.getShardDistribution()

I get the following output

Shard shard2 at shard2/82.X.X.X:27017
{
  data: '10.07MiB',
  docs: 14180,
  chunks: 1,
  'estimated data per chunk': '10.07MiB',
  'estimated docs per chunk': 14180
}
---
Totals
{
  data: '10.07MiB',
  docs: 14180,
  chunks: 1,
  'Shard shard2': [
    '100 % data',
    '100 % docs in cluster',
    '744B avg obj size on shard'
  ]
}

Why are the sizes so different? I only have one collection.

The following command didn't change anything either

db.adminCommand( { flushRouterConfig: "databse.Collection" } );