David,
Welcome! Very nice stuff!
FAA is VERY particular about borders/edges/cropping and even if you sold one of your paintings, FAA won't print it. So you need to crop into the art and make sure that any edge, has paint and not the white canvas or worse, the edge of the canvas.
As far as the copying, needs work. How are you copying these, smartphone? Ideally, a DSLR should be used and you'll get larger files and then larger images to sell. If you are going to use a camera/DSLR, here's my recipe: http://fineartamerica.com/showmessages.php?messageid=2764654
Let me know if you have any questions about the above instructions.
As Mike mentioned, titles and keywords are really important here, if you want your artwork to be seen, by others and buyers. So do some research and find other artists with abstracts and see how they use the keywords.
I would also raise your prices, starting around $22 or $25 and then go up. See how others do it.
ALL your art needs to be "tack sharp" in order to get it sold and printed, so you may consider doing most, if not all, over with a DSLR, or a flatbed scanner, if the artwork is realitively small and then you can stitch it together,
Rich