On the Web page, if the timer has been sent to the Beyonwiz, a one-off recording displays as

and a series recording has this icon

. If the recording is queued (IceTV knows about it, but hasn't sent the timer yet), a one-off displays as

and a series recording is marked with

. Donut/solid is queued/scheduled (sent), single/multiple is one-off/series.
The IceTV help pages have a
full list of icons.
I'm not sure how the icons are displayed on the iPhone app (if you're using that rather than looking at the mobile Web page). The Yahoo and OS X widgets always display solid icons, whether the timer has been sent or not. I don't know why there's that inconsistency.
The normal behaviour for adding a recording (single or series) is that the recording initially shows as queued (donut). When the recording is 5 days off or less, it will be available to be sent to the Beyonwiz (my IceTV recordings for Sunday and Monday haven't been sent to my Beyonwiz yet). The Beyonwiz requests IceTV Interactive updates about every 30 min, but it has to be running (not in standby) to do this. It will make its first request for updates at startup.
If you set a recording on IceTV Interactive within the next 5 days, it should be sent to the Beyonwiz within 30 minutes if the Beyonwiz is running, or within 30 minutes of when the Beyonwiz next starts if it was in standby. If the recording is more than 5 days off, the timer won't be sent to the Beyonwiz until the recording is 5 days or less away, and the Beyonwiz makes one of its regular updates.
Because of the time lags in this process, making several changes in a short time can be confusing.
There's more information about how the
Beyonwiz interacts with IceTV on the Beyonwiz Forum.