Amazon PA API does not show all Offers

Query:

$search = new Search();
$search->setCategory('All');
$search->setKeywords('lg 32 inch tv');
$search->setResponseGroup(array('BrowseNodes', 'ItemAttributes', 'Offers'));

Returns:

<Item>
    <ASIN>B00MHTQIO4</ASIN>
    <DetailPageURL>...</DetailPageURL>
    <ItemAttributes>...</ItemAttributes>
    <OfferSummary>
        <LowestNewPrice>
            <Amount>2400000</Amount>
            <CurrencyCode>INR</CurrencyCode>
            <FormattedPrice>INR 24,000.00</FormattedPrice>
        </LowestNewPrice>
        <TotalNew>11</TotalNew>
        <TotalUsed>0</TotalUsed>
        <TotalCollectible>0</TotalCollectible>
        <TotalRefurbished>0</TotalRefurbished>
    </OfferSummary>
    <Offers>
        <TotalOffers>0</TotalOffers>
        <TotalOfferPages>0</TotalOfferPages>
        <MoreOffersUrl>0</MoreOffersUrl>
    </Offers>
    <BrowseNodes>...</BrowseNode>
</Item>

... so it says TotalOffers == 0 for B00MHTQIO4, but its not correct. For the same item, 11 offers are available on the website:

Why am I getting incorrect results?