That's OK GMC.
Single span is when a length of timber is only supported at each end.
Continuous span is when a length of timber is supported at both ends plus is supported (once or several times)along its length.
The tables refer to the different types because a single span is weaker.
The joists in your project could be 3.6 long - they would then be continuous - or you could have 3/1.2 & they would each be a single span.