Print booklet issues

Hi All

I have been having some issues getting the print booklet function to work as I think it should

I have made an 84 page booklet and set it up to print as 2-up perfect bound (the only option that allowed me to specify signatures) I checked the print blank spreads box but when I checked the finished pdf afterwards (I printed to pdf to check that all was well before sending to a printer) I noticed that it had ignored the blank page and then inserted one at a random page later in the booklet to make the booklet page count a multiple of 4 (which it already was). Have I done something wrong or is this a feature?

My second issue is then printing to a non-duplex printer. I can't see a way to tell Indesign to print the odd pages first so I can then turn them around in the printer to print the even pages. This seems OK if I print the PDF, but I would prefert to print directly from Indesign. Am I missing something here? Simply typing in the odd pages as a range in indesign doesn't seem to work - it seems to treat those pages as the entire booklet.

Many thanks in anticipation of your help with this

Dave