Some others are a little more technical, such as the following. The omission of one of a pair of letters or group of letters. Sometimes a text has the some phrase or words. Homoeoteleuton is when a scribe skips over a portion of the text and omits what is between the two like phrases. The repetition of a letter, syllable, word, or phrase.
Scribal errors do occur as seen in the large amount of variances within the textual witnesses.
There is, however, another perspective which modern scholarship fails to reconcile. There is a spiritual force which seeks perversion and brings corruption to the texts. Advantageously, there is also a Spiritual Force which seeks purity and brings preservation to His Holy words. While we can expect natural corruption of the text because of human error, we can also expect corruption of the text because of the powers of darkness. And yet, we have the promise of God to keep and preserve His words and therefore we are assured of His success.