I tried to create the jobs in the similar way.
When creating the second job, I am getting the following error report -
ORA-00600: internal error code, arguments: [opibnd1], , , , , , , , , , , 
ORA-06512: at "SYS.DBMS_ISCHED", line 124
ORA-06512: at "SYS.DBMS_SCHEDULER", line 314
ORA-06512: at line 2
00600. 00000 - "internal error code, arguments: [%s], [%s], [%s], [%s], [%s], [%s], [%s], [%s]"
*Cause: This is the generic internal error number for Oracle program
exceptions. This indicates that a process has encountered an
*Action: Report as a bug - the first argument is the internal error number
Requesting you to let us know if there is any other simple way to do this.