Help with my tables

Three tables....Employee Information, Employee Hours, Employee PTO

Employee Information
Employee Id (key)
Employee Name
Hire Date
Job Title

Employee Hours
Hours ID (key)
Employee Name
Start Date
End Date
Pay Date
Sal/Regular Hours
Overtime Hours
Vacation Hours
Sick/Personal Hours

Employee PTO
PTO Id (key)
Hours ID
Work Day
Vacation Hours Used
Sick/Personal Hours Used

All seem to link fine in my tables. I open Employee Information table I get
a + to add those employee Hours and if needed a + to open their PTO (paid
time off) for that particular week.
Than I create a form based on Employee Information. I want to Click on a
link for "Hours" and enter hours information for THAT particular Employee,
the problem is I want it to automatically enter the employee name based on
what previous form I had opened. Why doesn't it know I'm working with that
particular employee?
If I'm working with "John Smith" Employee Information Form why can't I click
a link to Hours and "John Smith" already be ready to update? Why do I have to
use the drop down to pick John Smith?