SATALERT obtains the viewing times from various webpages maintained by NASA's "Office of Space Flight" (OSF) website. Even though this department of NASA has been actively updating these webpages for over a year, they sometimes get a little behind in updating them (usually by a day or two, but sometimes it can be as long as a week or two). So, if you see old data it just means they haven't updated them yet. So, just try re-running SATALERT again in a few days and hopefully they will have updated their webpages by then. I don't receive any advanced notice from NASA of when the webpages are expected to be updated. So, when my program creates the "Check back on..." task, it is simply making an educated guess of when the next update will be based solely on the expiration date of the previous schedule.

I'm also just taking a guess here, but maybe the reason why they don't always update their webpages immediately after the previous schedule expires, is because there are no viewing times available to mention, or that the current viewing times are less then 2 minutes in duration and/or less then 10 degrees above the horizon - making a sighting very difficult, so OSF usually doesn't include these types of viewings in it's schedule. A delay in updates could also be due to changes in ISS trajectory caused by various orbit-correction maneuvers and/or docking with the space shuttle.

Also, a few users have inquired why at times do the OSF webpages that SATALERT uses have no current viewing times, but the "Human Space Flight" (HSF) website of NASA does have current viewing times listed. My answer is this, I have found the OSF viewings times data to be more accurate then the HSF website on many occasions. You would think that since both the OSF and HSF are departments of NASA, they would use the same data to generate their viewing times. But surprisingly, each department's data can be significantly different. For example, take a look at the below viewing data from each department for the city of New York, and notice the huge 10-minute difference in the viewing start times, and a 200+% difference in the duration time for the 8/19 viewing opportunity:

Office of Space Flight Viewing Data
(SATALERT uses this data)

Human Space Flight Viewing Data
*** NEW YORK, NY ***

The bottom line is that I have found the OSF data to be on the money every time for my home city - I have not received even one complaint from someone saying that the viewing times of my program have been inaccurate. However, I still may add support for the HSF's website because it also provides viewing times for the space shuttle when it is in orbit - I just need to figure out if there will still be interest for this feature if it turns out that the HSF shuttle viewing times are too inaccurate to be useful for my program.