Note the reason you are seeing this "underscore phenomenon" on upgrade is that you changed the default services in some way.
In R80.x, you cannot delete or adjust the default services by design.
Generally I would use the new services in R80.x and replace the underscore services with their R80.x equivalents in your rules, but you should do a visual inspection of the services in question.
If you need HTTP on a different port (for instance), you can always create a new service like so:
One way you can easily replace these "underscore" services with their equivalents is to use the "Where Used" functionality, which gives you the ability to do a Replace.
Right click on the service object and select Where Used.
You can then choose to replace it with the non-underscore version.