Old beginner crochet problem

I am re-learning to crochet after many, many years off. It doesn't all come back automatically. At first I had a problem, and still do somethings, with the ends get shorter as a crochet, but that's getting better. No the problem I have is, it seems that my crocheting turns into a circle. I am trying to crochet straight and flat, but it just ends up turning into a big circle. I have searched and searched for what is wrong and can find nothing. I am opening for suggestions and help ya'll!! :)

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