#1 is to make sure all your passwords and usernames are hacker unfriendly. Make them long and complicated and change them often.

Next, check your logs to see if anybody else has done the exact same thing.

Check with blogger to see if they know what it could be all about.

Since you are using 3rd party software, it is hard to really secure it. That is up to the 3rd party. Best you can do is change things up so you are not like the rest of the blogger users. Not sure what exactly you can do. Maybe change default folders?

__________________
Freelancers Gone Wild | Take your advertising to the next level | BLASTOFF! To make money and save money