Dittography in the Great Isaiah Scroll

Generally speaking, I consider it much more common accidentally to omit one of two similar words or phrases in a text (haplography) than to accidentally repeat a phrase (dittography). This is due in part to the fact that mentally engaged scribes are likely to note the repetitive copying of dittography and correct their errors, whereas scribes commiting haplography are more likely to be left unaware of their errors. In reading ancient manuscripts, this seems to bear out statistically. I have been reminded recently, however, about the real possibility of dittography in my reading of the Great Isaiah Scroll. I have recently come across two clear instances of dittography in 1QIsa(a) which serve as good reminders.

Isaiah 31:6

MT: ...שובו לאשר העמיקו
"Return to him whom the sons of Israel have so greatly rebelled against."

1QIsa(a): שוביו לאשר לאשר העמיקו

The Isaiah Scroll here has accidentally repeated the word לאשר translated "to him whom," rendering nonsense.

Isaiah 34:15

MT: בצלה אך שם
"... in its shadow. Also there ..."

1QIsa(a): בצלה אך אך שמה

The Isaiah Scroll here has accidentally repeated the word אך translated "also," rendering nonsense.

Merib-Baal or Meri-Baal in 1 Chronicles 9:40

My wife and I read an interesting note about the tiqqune sopherim ("emendations of the scribes") in my wife's archaeological study Bible today, and they mentioned that often scribes changed the names of individuals to remove the name of a pagan deity (for instance Ish-Baal "man of Baal" becomes Ish-Boshet "man of shame," and likewise Merib-Baal becomes Mephi-Boshet). Irony of ironies, in my personal reading tonight I was in 1 Chronicles 9 and came across exactly this genealogy of Saul. I noted a textual problem beyond the question of what the article in the study Bible mentioned, however, in the name of Merib-Baal.

1 Chronicles 9:40 gives the name of Jonathan's son Meri(b)-Baal twice:

"And the son of Jonathan was Merib-Baal (מריב בעל), and Meri-Baal (מרי בעל) begot Michah."

In 1 Chronicles 8:34, an identical verse, both instances are spelled Merib-Baal מריב בעל, strongly arguing that this is the correct spelling. It is interesting though, that the LXX (according to Rahlfs) has in all cases Μεριβααλ without two betas, which may mean that מרי בעל was read. HALOT mentions that an ostracon was found with the name מרבעל. Holladay actually argues that מריב בעל "antagonist of Baal" may even have been "reconceived" from מרי בעל.  In the end, it is clear that one of these two spellings put side by side is textually corrupt, either by haplography or dittography of the additional ב beth.