The same trouble has been a week

thanks all guys, I think I know what to do.

Hello everyone：
       I'm a new member and want to be a contributor for SS.From the beginning of last month, I tried to upload some of my photography, for submission.For the first time, there are 4 photos are accepted; second, there are 6 photos are accepted.Now, I want to have a try.However, Some problems will always haunt me.
       First,can I reupload the photos what are accepted before?
       Second,if I become a contributor of photography, can I upload my illustration works with the same account.
       My English is so poor,and do not know whether you can understand.I hope to get your help,thx.
       Regards.