question on reporting bytes transferred

[Mario Tambos]

hi, i was reading a rsync log file, and i discovered that the summatory of
each file transfer(in bytes) doesn't match the total transfer for the
operation.
for instance:
 2005/09/28 22:02:06 [1072] rsync to NOC from nocbox
(63.110.176.221<http://63.110.176.221>
)
2005/09/28 22:02:07 [1072] IdsProcessor/IdsProcessorLogs/
2005/09/28 22:02:11 [1072] IdsProcessor/SysLogs/Heartland-Bank/Pix/
2005/09/28 22:02:14 [1072] recv nocbox [63.110.176.221<http://63.110.176.221>]
NOC () IdsProcessor/Heartland-Pix.ini 196
2005/09/28 22:02:14 [1072] recv nocbox [63.110.176.221<http://63.110.176.221>]
NOC () IdsProcessor/Netra-Pix.ini 189
2005/09/28 22:02:14 [1072] IdsProcessor/SysLogs/Netraspect/Pix/
2005/09/28 22:02:15 [1072] recv nocbox [63.110.176.221<http://63.110.176.221>]
NOC () IdsProcessor/IdsProcessorLogs/2005-09-28.log 17865
2005/09/28 22:02:15 [1072] recv nocbox [63.110.176.221<http://63.110.176.221>]
NOC () IdsProcessor/SysLogs/Heartland-Bank/Pix/2005-09-27.log 3672547
2005/09/28 22:02:16 [1072] recv nocbox [63.110.176.221<http://63.110.176.221>]
NOC () IdsProcessor/SysLogs/Heartland-Bank/Pix/2005-09-28.log 2966161
2005/09/28 22:02:16 [1072] recv nocbox [63.110.176.221<http://63.110.176.221>]
NOC () IdsProcessor/SysLogs/Netraspect/Pix/2005-09-27.log 4657772
2005/09/28 22:02:25 [1072] recv nocbox [63.110.176.221<http://63.110.176.221>]
NOC () IdsProcessor/SysLogs/Netraspect/Pix/2005-09-28.log 37227933
 2005/09/28 22:02:25 [1072] sent 28 bytes received 40821968 bytes total size
1274599569
 the summatory of the file's transferred bytes(in yellow) is 48542663. it
doesn't match the received bytes(green)(about 8mb less) nor the total
size(grey)(more than 1gb higher) of the last line.
 what can be the reason of that difference? i thought the "sent/received"
log-line represented the file's original total size and the total transfer
of the operation.
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