only 50 imported CSV file


I'm clearly missing a setup option, or something (sorry i did search it and couldn't find what i was looking for).

When i log in as a customer and choose to import a CSV file it reports that it has done everything successfully but on reviewing the list it appears as though only 50 subscribers have been imported. i checked under settings -> import-export, and set all the limits to the max i could but this didn't make a difference.

Where am i going wrong?
Right, thank you. I didn't notice originally as i setup a test list in excel, but it didn't autocomplete the emails properly so there were duplicates.

Sorry for wasting your time, and thank you for you amazingly quick responses!!!