Hi.  You are correct that map didn't have the destination mapped correctly, but the method you chose to fix is called splitting the ways.  

Splitting the ways confuses navigation systems cause it implies you can't change lanes in that area.  It also ends up being more maintenance in the long run.  The rule of thumb is to only split when there is something physically preventing you.

It is a common mistake made by new mappers (I made it myself more times than I want to admit) because the web interface doesn't make the approved way obvious.

The approved way is to update tags per lane.  See (Destinations Per Lane)

https://wiki.openstreetmap.org/wiki/Key:destination

Most people working on highways use the JOSM editor cause it has a better visualization for all the various tags which makes it easier to tell if they're tagged correctly.

To resolve the issue, the best option is to revert the changeset.  If the previous version was mostly correct it can be faster and help preserve history of sections of roads.  Then reapply the correct tags.  (One tool is https://revert.monicz.dev/ and you just put in the changeset number)

The other option is to manually change it back.  The downside to this approach in this case is if you delete the wrong road you lose the history of it.  

Let me know if you want to learn how to do this yourself or if you would just like another mapper to resolve it for you.