F-22 word puzzler

Lockheed Martin's annual earnings statement today contains some cryptic remarks about the F-22 program.

The bamboozling statement -- strangely repeated twice in the same paragraph -- seems to express something negative. The context of the statement is the fact that operating profit at the company's aeronautics division dropped in 2008. This is one of the reasons for that decline:

In Combat Aircraft, the decrease mainly was due to lower volume and the decline in 2008 of the amount of favorable inception-to-date performance adjustments recognized on the F-22 program, which more than offset improved performance on F-16 programs.

If I had to guess, I'd say this suggests that the F-22 assembly line made more mistakes last year than in 2007, or perhaps did not improve as expected on the learning curve. But I'm really not sure.

Anybody got any theories?