OEM + 3rd Party Battery (E-M5 w/HLD-6)

Since OEM batteries for the E-M5 don't seem to be available anywhere, I purchased a 3rd party battery through Amazon. ( http://www.amazon.com/gp/product/B0084H5JGQ/ref=oh_details_o00_s00_i00 ) By itself, the battery works just fine. But when used in the HLD-6 grip in conjunction with the OEM battery, all kinds of weird behavior takes place. Principally, the menu settings in the camera take on a mind of their own. I have had the camera take over and enable bracketing, Hi-speed release mode, buttons changing function (or not functioning at all), WB changing, etc.

With either battery alone in the camera w/grip, no problems. Only when they are both installed.

I don't know if this has been previously reported or discussed, but if not, I wanted to get it out there and see if anyone else has had the same experience.
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rmarko