Seems to me woocommerce can’t count?

Rounding problem, this image describes it all: ORDER TAX WRONG

Woocommerce settings: latest, no related plugins, tax is 15%, prices inserted tax incl. (tried tax excl, didnt help), rounding to two places, woocommerce settings > tax > subtotal rounding option (allegedely problematic) is off.

Shouldn’t be 868.70 x 2 = 1738.40 instead of 1737.39 ? I understand that 868.70 is rounded but shouldn’t the rounded unit price be concluded in 1737.39 subtotal? Or is this expected beaviour?

Thanks.