The issue here is a trait from the Cheliax, Empire of Devils called Threatening Defender lowers the attack penalty when using Combat Expertise. When you select Combat Expertise the trait doesn't lower the listed attack penalty within the character sheet. (See attachments).
I listed this as a bug since I have seen other trait, feat, race combinations change the wording in other areas of the character sheet once built.
------------------ Time of this report: 9/23/2013, 07:30:33
Machine name: JFREEMA-MOBL2
Operating System: Windows 7 Professional 32-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_gdr.130104-1431)
Language: English (Regional Setting: English)
System Manufacturer: Dell Inc.
System Model: Precision M4600
BIOS: Default System BIOS
Processor: Intel(R) Core(TM) i7-2720QM CPU @ 2.20GHz (8 CPUs), ~2.2GHz
Memory: 4096MB RAM
Available OS Memory: 3316MB RAM
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Windows Dir: C:\Windows
DirectX Version: DirectX 11
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DWM DPI Scaling: Disabled
DxDiag Version: 6.01.7601.17514 32bit Unicode