The answer to that question is a simple one: extended hours trading (both pre-market trading and after hours trading) does not affect dividend rules. Buy before the ex-date (no matter if in pre-market trading, regular hours trading or after hours trading) you qualify for the dividend; buy on or after the ex-date (whether in pre-market trading, regular hours trading, or after hours trading) you don't qualify for the dividend.
On further research I reverse my opinion. Shares purchased AH today DO qualify for the dividend according to the wiki page. This does not jybe with my sense of fair play but you could put in a low-ball bid and see if someone bites.
AH open till 9 PM,I'm holding onto my shares, every time I sold it bounced back up in a few days.This time I'm not making the same mistake.In the 3 days it takes to settle the trade it usually makes up a good part of the 1.25.