Amazon prices not correctly showing

Hi, I've recently started using your app, and love it. I have noticed, however, the prices you have for Amazon are often not correct. Yesterday, you stated that 'Aveeno skin relief' on amazon was around £2.70. when i followed the link directly to Amazon, it was infact atiund £7. Today I received an email from you about Amazon, having the cheapest Aveeno at £2.60, however when accessing Amazon, it was £7 still. i think you are potentially taking the 'per 100g' price for this product and comparing it to the full price (300g) for other providers. Kind regards Oli Bryant