[CentOS] Strange behavior from grep

Hi,

It's been a long time since I've been noticing a strange behaviour
from CentOS grep command.

But today, I really need it.

I have a file that has the word gamito inside of it.

If I run
$ grep 'gamito' file

it returns nothing. Yet, if I run
$ grep -c 'gamito' file

It returns 1 which is right.

The mind boggles.

Does anyone ever had this problem or am I missing something here ?

Any help would be appreciated.

Warm Regards,
Mário Gamito