There are two type of variables in Yaskawa robots, global and local.
It is depends on what type you are using.
The global Position variables show with P and the local Position with LP.
If you are using normal position variables that are under VARIABLES menu, it is global variables therefore any change in this variables have effect on all job. If you change this variables in a job, it have effect on other jobs too.
But if you use the LP variables, the change of this variables have effect only on job that are using it. The local variables must select and active in each job separate.