Kohen and Levi in Other Aliyot

If it is possible for others to be called up, and in the meantime, the Kohen stands next to the bimah throughout the reading and waits until the last aliyah or maftir, then the Kohen should receive the last aliyah or maftir, which is preferable. If this is not possible, for example, on Rosh Chodesh or Chol HaMoed when there is no last aliyah or maftir, and it concerns an aliyah where an Israelite has already been called after the Kohen and Levi, such as from the fourth aliyah onwards, the Kohen should bless and ascend immediately, and the reading continues as usual. However, if the Kohen was mistakenly called immediately after another Kohen was called, it is forbidden for the Kohen to ascend, as it appears as if the previous Kohen is not a valid Kohen, hence another Kohen was called.