1,807,461 @1.9950 after hours !!!?

here are the last 10 trades:

Today: 23-Mar-2005
Time(AEST) Price Volume Value Condition Codes
17:54:06 1.9950 602,487 1,201,961.56 SX
17:49:35 1.9950 602,487 1,201,961.56 SX
17:10:22 1.9950 602,487 1,201,961.56 SX

16:05:53 1.9200 2,314 4,442.88
16:05:53 1.9200 18,799 36,094.08
16:05:53 1.9200 4,000 7,680.00
16:05:53 1.9200 2,402 4,611.84
16:05:53 1.9200 7,000 13,440.00
16:05:53 1.9200 50,000 96,000.00
16:05:53 1.9200 2,969 5,700.48

We had 3,607,563 today in regular trade. So half the volume went back at almost $2 ????

Can anyone explain this magic trick???