your right. I am using Acrobat. didn't even know I had it. I've been bugging the IT guy for Acrobat for a while. I have no idea how long it's been installed. I had just bugged him again last week.
reader is still set as my default. without even realizing it, i've only been using acrobat to combine and print large files.
the only way to combine pdf's in reader is to use Adobe's online service which you have to pay for.
I'm sure there's some third party software out there. I use bluebeam to mark up pdf's. it's free.
don't know if it can be used to print or combine multiple files. never tried.
the method of dragging and dropping pdf files into the printer window does work with reader. (I checked)
As I said, it prints the documents out of order which can be a pain.
I found this discussion because I was searching for a way to get the documents to print in order. Haven't found one......yet.