I have the Aegis set that I crafted and I noticed that my shield arrary dosen't fit the stats that are displayed. I have put up a link to the picture so you guys can take a look? Might not be a bug but might be my current setup, all though I have tried with other sheilds and they display the correct shield setting with no reduction.
The tooltip in the first screenshot is the shield's base power. However, every ship has a shield multiplier - escorts have reduced shields, science vessels have increased shields. There's also skill tree and level contributions involved, but the discrepancy in the two pictures is consistent with the different ship classes.