weird growth

]So this is my first grow and i have 3 plants. One of my plants is growing in an odd pattern. the branches are growing in an off-set pattern, rather than being parallel to eachother, it just started doing this with the last 3 or 4 new sets of branches. And they are 77 days old today. So my question is this, is this normal or dose it meen something? The plant in question i believe to be sativa domanint.

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Just looks like alternating nodes to me. That means your plant is sexually mature. Ready to flower given the right light conditions. Your others will do the same when they get a little older. Hope that helps

yes that answers my question thank you