I don't understand your T6 at all. You had Necropolis, Spoils, Chapel, Copper, Copper; and you...passed the turn??? You should be using that Spoils, and trashing something. If you felt you really needed that Necropolis still, you could trash even just one Copper and buy a Tournament, or trash them both for a Silver; but I would trash everything and buy a Silver with the Spoils.
And on turn 7 you made the same mistake, holding Necropolis, Spoils, Chapel, Silver, Copper: you trashed nothing, and played the Silver+Copper to buy a Silver! At the very absolute minimum you should spend the Spoils as well to get a Gold instead.
You should be rushing to get the Spoils out of your deck and convert it to something long-lasting; it looks as if you were hoarding it in the hopes of getting a fast Province, but for every turn you draw it and don't spend it, it might as well be a Curse. The early boost that Pillage gives your economy is wasted if you won't use it!