Trading softwares, page-9

hi all ...
slightly off topic question from a novice trader  .....
I am looking at the trades in good ol PLS   ......  (it's a stock that as caused some heated discussions amongst some of the olders lol)  ...
In the trades there are a few at ZERO  vol @ 0.0c  !!!
Why is this so?  And what, if any, effect do these phantom trades have on the big picture ??  
Cheers for any insight you may bring to the table ....

Doc.   

	Column 1	Column 2	Column 3	Column 4	Column 5
0	:21:10 PM	0.000		0.000
1	1:20:10 PM	0.000		0.000
2	1:19:10 PM	0.000		0.000
3	1:18:54 PM	0.550	54,485	29,966.750	XT
4	1:18:45 PM	0.5475	23,958	13,117.005	CXXT
5	1:18:10 PM	0.000		0.000
6	1:17:10 PM	0.000		0.000
7	1:17:10 PM	0.000		0.000
8	1:15:10 PM	0.000		0.000
9	1:10:09 PM	0.5475	1,042	570.495	CXXT
10	1:09:14 PM	0.550	9,090	4,999.500
11	1:09:14 PM	0.550	2,355	1,295.250
12	1:08:00 PM	0.550	7,645	4,204.750
13	1:08:00 PM	0.550	5,000	2,750.000