Thanks for helping to bring this to our attention.
Based on the information you provided, I believe you were impacted by a recent technical issue which caused behavior just like you described to occur for users who have the “Upload” option selected from the “Default View when Selecting Images on One-Page Lister” drop down menu within their Account Preferences.
We just released a change intended to address this issue yesterday afternoon, so I do not believe you should continue to encounter similar difficulties as you upload additional images from the lister page moving forward.
If you encounter any remaining issues like this, however, please contact our Customer Support team directly from under the “Help” tab on our site and we will look into things further. We apologize for any inconveniences this may have caused.