I have a feeling SpaceX intentionally names things kind of weirdly just because it's almost a running joke among fans.

The progression of Falcon 9 rockets is:

* Falcon 9

* Falcon 9 V1.1

* Falcon 9 Full Thrust (also called V1.2 for a small period of time)

* Falcon 9 Fuller Thrust (I think this one was renamed to Block 4 at some point, but I distinctly remember hearing it called "Fuller Thrust" at first)

* Falcon 9 Block 5 (the current version and one that launched this capsule)

And their Dragon capsule has gone through several names as well:

* Dragon (the first version)

* Dragon CRS (an extended version with additional space)

* DragonLab (never flown as far as I know)

* Dragon 2 (cargo only I believe)

* Crew Dragon (the current one that just flew up to ISS, also technically a "Dragon 2" but with a different internal configuration.)