Actually, this has been a common problem with 2x10 drive trains. SRAM hasn't made this public because of fear of backlash, but you are not crazy. I have a few friends who have had the same exact problem. Constant chain suck is driving people crazy. In some cases, SRAM has upgraded the components to XX. The main fix, however, has been to go to a rear derailleur with a small cage!! I know this sounds crazy, but I can get you in contact with someone who has had the exact same problem if you IM me. It is not a chain issue or a problem with your crankset, apparently, by increasing the tension with a smaller rear derailleur, the problems have been eliminated.
Good luck with your resolution. All I can say is be persistent, and you will get the problem resolved.