For the first question. I think that you have used photos taken from your alibaba site or may be you ask for a water mark.For the second question,there must be special techniques for that time to be taken but it is quicker than 24 hours .regards
If you checked the box when listing to include a watermark, the watermark is automatically Alibaba's (in itself a possible infringement as Alibaba do not own the photo or product).
To put your OWN watermark on it you will have to add it to your photos BEFORE you upload them and then choose NOT to use the Alibaba watermark.