Version number not updated on site with update

Hello,

I updated out production PBI reporting server to the May 2019 version. Version numbers on the Reporting Server Configuration utility is stating 1.5.7074.36177. However when I look at the PBI website, it indicates the version number is 1.3.6816.37243. So it would seem the version numbers have a mismatch. The update in out test and development evironments have the same version number (1.5.7074.36177) on both the website and in the Reporting Services Configuration utility.

I have installed PBI twice, restarted the server, etc. with no changes.

Any advice?

Thanks

David