i think its just a new feature of poedit, i had this often with my plugins
if poedit cannot find any translation for a string, the programm "suggest" the most common translation from the memory and marks it orange with the hint to check this...
also it marks every line that doesnt start/end correct...
e.g. if a string ends with a dot and the translation not, the programm will show you a warning about that
i like it