item clicky RecastType quetsion?

[ChaosSlayer]

How does diffirent RecastType differs? what do they do?
before i thgout that item either- has a recast delay or don't
but now i see there are difirent types of them? whats all that mean?

i amade a few clicky items, both instant cast and long cast, and put recast delays on them but they don';t seem to have an effect - all items can be chain clicked and delay does not kick in for soem reason.

thanks!