Doing two payrolls for 2 different pay periods at one time

SUGGESTED

I am having to put a older payroll into Sage from the beginning of this quarter before we started using Sage. I have not finished with that Payroll but it is time for the real payroll to be entered. Can I do 2 payrolls at one time? Since the pay periods will be different and check dates will be different will they overlap in any way or is this safe to do this?