There are two ways of lying - one is to tell falsehoods, the other is to leave out stuff that changes the story. I think it's unlikely that the Wasilla Project are telling falsehoods here, because it'd be too easy to show those up. And they are pretty specific accusations - cutting corners, not getting authorisation for spending, building on land which wasn't owned.

That means there's a prima facie case for believing that they are right in thinking she is a pretty dodgy politician, with a taste for taking advantage of her position. It's possible that there are specific explanations that change the way the story looks - but they'd need to be pretty specific. If so I'd expect other people in Wasilla to come up with them sharpish.

The fact that the people making the accusations might be her political opponents is irrelevant. After all, if they think she's that bad they'd have to be opposed to her.