Two highly respected books: Atkins, Chemical Principles 5th ed. and Clayden Organic Chemistry 2nd ed. don't agree on the orbital arrangement of the $2p$ orbitals of $\ce{N2}$. Clayden on page 94 states that it is $\sigma_{(2p)}, \pi_{(2p)}, \pi^*_{(2p)}, \sigma^*_{(2p)}$ and Atkins on page 118 states that it is $\pi_{(2p)}, \sigma_{(2p)}, \pi^*_{(2p)}, \sigma^*_{(2p)}$.
I am a retired engineer with a consuming interest in how the brain works and am trying to give myself a good grounding in organic chemistry. This may be a trivial issue, but to a novice it hardly seems so. This kind of division within the chemistry community is very concerning.
Any ideas as to what's going on here?