New to investing:so any help understanding this trade would be...

New to investing:
so any help understanding this trade would be helpful
Hi all,

could someone please explain, the following course of sales:
Source Comsec:
Trade of BPT occuring on Monday, 02 Feb 2009
52 Week
Time Price Volume Value Condition
04:22:45 PM 0.775 8,998 6,973.45 XTET OS
04:20:29 PM0.810 138,642 112,300.02 XTSXOS
04:13:25 PM 0.760 15,000,000 11,400,000.00 XTOS
04:10:22 PM 0.810 4,177 3,383.37 XT
04:10:22 PM 0.810 1,765 1,429.65
04:10:22 PM 0.810 15,681 12,701.61
04:10:22 PM 0.810 12,554 10,168.74

How can someone buy for .76 when there where others looking to buy at .77 and higher at the time.
are not all shares available listed in the sell.
Source Comsec:
Number Quantity Price
1 1,246 0.805
2 67,724 0.800
3 21,690 0.795
3 38,640 0.790
4 225,774 0.785
2 32,000 0.780
6 51,850 0.770
4 66,400 0.765
2 26,000 0.760
5 122,112 0.755

then the price bounce straight back

The stock lasted at .76 as follows (prior to the one detailed above):
10:09:48 AM 0.760 4,437 3,372.12
The rest of the day it slowly climbs higher,


any help understanding this would be great,