why and what were the penalties imposed?
I can't find exactly what, but it was an "homologation penalty" imposed for the 7 & 8th rounds in Portugal. Before that the Aero had been setting poles & a win. Afterwards, Audi won everything.
To be fair, Aston & Corvette also had homologation penalties - it seems that the rules were relaxed between 2008 & 2009, and Morgan found an edge in May & June races.
Will