Fixed rejected IXUS 130 due to p/shot SX 130 IS

IXUS 130 listings were being rejected as their MP ratings didn't match
the rating inferred for the product. The inferred rating came from the
Powershot SX 130 IS, since the "130 IS" model was the same as the IXUS
130. This was resolved by using the BEST unfiltered matches, rather than
ALL rules engine matches.