Your photographs are amazing and you are a very skilled artist:) Just try to post only one artwork per daily cycle. There is no rule about this actually and none will prevent someone from posting more than once per day, but it is to the artist advantage to submit art in this way. You must try to think nTopaz as a Contest Platform, the daily top 10 is the main contest and the other 15 day contests are around. The daily rewards and the place at the Top 10 come from the number of points a post gets at the end of the 24 cycle, the score. If an artist post more than one submission, risks to have the score divided between those submissions and end up with low scores in all of them.

Also keep in mind that you can edit your post at steemit afterwards if you want to change sth. Keep up the good work:)