My squash/butternut is not butternut, these are round, bigger than cantaloupe, a little yellower skin and grows on vine?
I bought seed online that was supposed to have been butternut-- have grown butternut in past. This variety vines like butternut, but does not look anything close to butternut. Fruit is round, about 6 inches in height and about as big as a soccer ball.
Certified GKH Gardening Expert
This isn't uncommon, and will likely result in a healthy butternut. Sometimes they can start out almost round, or cube-like ,even!
Sometimes, though, seed companies can accidentally mislabel seeds. This could be the case here, as well.
This article will help you to care for butternut squash: https://www.gardeningknowhow.com/edible/vegetables/squash/growing-butternut-squash.htm