Yeah I know it doesn't look the way you exptected it to be :-)
Please notice that these ~60,000 active users don't necessarily need to be the very same each day. So the total of (different) active users per month is higher as you can see here.
The activity is decreasing since March which usually happens when the Steem price drops.
These one here for instance are very helpful in that context - notice the gap between the red and the green line (that's the missing retention), but: we have more than 400,000 active users in total with is ~40% of the total number of created accounts:
Source of the above included charts
I recommend you to follow these accounts that provide high professional statistics: @arcange, @penguinpablo, @paulag.
Knowledge = power :-))
Steem on!