Which version are you running? Mac or PC?
I am running it on a Mac and found the invoice set up to be very touchy. I had to play with the settings in the preferences layout sections to get everything to line up to where it wasn't going into the next line.
You can also change the font size which would help with that problem.
Also, if you go into Invoice Layout / Content, you can rename most of the titles.
I don't think you can get rid of the qty column. It will automatically take away other columns that we may not use for a particular invoice, such as discount or tax. But you're pretty much stuck with Qty. Even if you go into the add item dialogue box and delete the quantity, it will still default to putting a "1" there. Just one of the idiosyncrasies of the program. Other people have requested the option to remove it, so maybe a version someday will do that. Unfortunately, you have to purchase a new version, you can't just upgrade.
Overall, this is a neat little program. Get used to the little things it does. Play with your settings.
Hope this helps! Teri