There is a bug while adding the same product twice to the cart but with different variation.
Suppose you have a product
“Test Product” Base Price: $2 Variations: Var 1(+$1)
Var 2(+$2)
Now suppose we added “Test Product” to the cart with Var 1(+$1) and then we continued shopping went to the same product “Test Product” added it again to the cart but this time with Var 2(+$2). You will see in the cart that it showing quantity as 2 but both the products are with same variation i.e. Var 2(+$2).
