I had a problem with an Epson RX620 on my imac which was printing first page last, no settings to change this. I have recently updated to Yosemite which I believed was causing the problem. anyway, go to System Preferences/printers and scanners/select your printer then delete it with the -minus sign, then add it back with the + plus sign, make sure the printer is connected and turned on. Apparently this re-installs the drives automatically. Hope this helps.
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