you are right. I have 154 lvl 10 walls and 96 lvl 9 walls, yet my gold grab shows 417 million, so my base really looks like a gemmed base although i have been farming since October 2012.
i shouldn't have maxed my walls so early. All my efforts are not reflected. Now you know why i hate my base.
I really feel like abandoning my account. Played more than 10 hours everyday from September 2012 till July 2013, yet 2/3 of the gold i raided is not shown in my gold grab.
When i went global, i got accused that i gemmed my base. When i tried to join farming clans, i got rejected because they thought i gemmed my base. Finally i got into a clan, and the new th8 and th9 all got gold grab hgher than mine. Everyday, i got clanmates asking me whether i gemmed my base. The game is no longer fun, and there is no future for my profile.