Can you create the text as a text layer on NOT on a jpg?
Can you use a PNG instead of a jpeg as your back?
Also, thin does not do well with grfx sometimes, as mentioned.
You can export to any format/specs you need.
File~Export (CMD-M)
Select your settings and send it to queue and will open AME.
Duplicate the “In-Que” as many times as you need files.