If I recall correctly, Sutil had slowed and was on an "in" lap. {cosworth151 - 3 posts ago}
It was an out-lap, and therein lay the problem - Sutil was going slowly (which baulked Webber) and then passed him to prepare for his hot lap (which prevented Webber from doing a second flying lap of any consequence).
The rubbering-in of the circuit meant that any previous run would be useless for getting into Q2, hence Webber's predicament.
I can completely understand why Adrian didn't give way. It was still a mistake not to and hence my only query on the penalty was why it wasn't five places like it usually is. Sebastién Bourdais could have felt a bit aggrieved as a result.