extra space between a word

[shravsi]

Hai fellow club members,

I am currently reading a book, in which I am seeing a few words with extra spaces.
For eg: Sister Teresa-Sister Tere sa
tomorrow- tomo rrow
Aaron- Aa ron

Can someone please let me know, what causes this during typing?
And should I count these words as grammatical errors?

I am not sure why I am seeing an extra space between only a few words in the whole book.
If anyone has any idea, please, can you help me to understand this better?

I really don't know, how to explain my problem. And I don't know if I can use the book's name also.

[MrsCatInTheHat]

Yes, count these as errors. There is no need to tell us the book here. Simply note the errors.

[shravsi]

Yes, count these as errors. There is no need to tell us the book here. Simply note the errors.

Thank you