The general principle is that captures aren't actually worth a whole lot. Territory (area under your control) is where it's at. If a capture is a means of getting more territory, that's grand, but on it's own it's not worth much at all.
Does this help your self diagnosis? If the computer ignored a capture it's because it didn't actually lead to a lot of territory gained, whereas whatever move it played probably did.
Does this help your self diagnosis? If the computer ignored a capture it's because it didn't actually lead to a lot of territory gained, whereas whatever move it played probably did.