It happens....Just be glad it was that easy
. When I first saw the issue it took me a day to figure out what was going on and what e-mail I missed.
268 was a long long time ago so I would assume you are on dialup so the best advice I would give is check for program updates more often
cause you missed 278 and 280 and I think there was another one somewhere in there too before 289, but I might be wrong.