Yeah whenever I draw things it erases at the intersection lol im not pressing any hot keys or nothing. This also happens when I select an object and it erases the whole thing.
example? okay. :D

Yeah i think that's a bug :I Ignore it xD just fill it with the bucket tool...

This is definitely a bug but it usually doesn't happen every single time. If it does happen every single time you could try reinstalling flash. If the problem persists try another version of flash or just fill in the gap.

Your computer mght be chopy.