How come rover can't do a weekend visit correctly with 1 visit friday ,2 on sat / Sunday and, 1 on Monday?

The problem you encounter has been around forever and the sitter and owner community wish they would fix it, but so far they haven't. If the total is correct and you communicate effectively with your sitter they can handle the correct number of visits you require - best of luck

If you want to communicate with Rover, then you need to either call them at [Edit: Rover’s contact options have changed. Visit the Rover Help Center at https://support.rover.com/ to find the phone number, help articles, or chat with the team].

or use the webmail form found in the Help section. Here is the link:

https://support.rover.com/hc/en-us/re...

They are not going to see your comment here.