Ligatures in the overlay text make some words unsearcheable

[ghost]

For example you cannot search for the word "dotted" as in a dotted pair.

For example, on page 645, the words "dotted tails" are overlayed with doed tails.
Note the unicode ligature.

On page 611:
"All of the company’s em-
ployees aend this meeting."
Note the ligature again.
The ft ligature is also commonly wrongly overlayed, as in page 633 "After Louis types this"