Conditional response firing when bot should do nothing?

Hi,

I've created a conditional response related to a keyword submitted by the user and the conditional response fires as it should do, but then if the user types anything at all after that, the bot fires that response again, instead of reverting to the fall back of doing nothing? See here screen shot: https://s3-eu-west-1.amazonaws.com/invent/snatch+bot+explainer+2.png

Also is there are way to make double tiered condition that effect each over, like a condition within a condition?

For instance,

Can I make a long list of keywords to appear anywhere in the user response, but filter them through one other overarching keyword?

Keyword list: T-shirt, Hoodie, poloshirt, vest, random item of clothing

Overarching filter word: Price

Thanks
Lee