The transparency flattener is grayed out because the transparency is left live, no flattening is happening in the PDF, and the convert strokes to outlines setting is irrelevant (and wouldn't be affecting the text anyway, unless perhaps if it was stroked, as far as I know).
This sounds like a printer issue (I don't see the Adobe logo or the word "Genuine" associated with Postscript in the specs or description for the printer, so I suspect it's an emulation), or possibly your PDF is being placed into another program for imposition and is being improperly flattened there. How does it look if they use the PCL driver (or maybe thay ARE using the PCL driver instead of the PS driver)?
Thanks for the reply. I appreciate your time.
I'm going to have the document printed on several other printers to make sure it's printer specific. You are right about the Postscript issue, as the specs read, "Postscript3 compatible."
I'm also going to determine exactly what steps they are taking to print the document on their end and get an answer to the questions you posed. I'll ask if they can make a print from both drivers and compare the two. If the problem is printer specific, then I should be able to get their Sharp tech on the phone to hopefully resolve the issue.