I have the same issue and it has been a problem since the day I received the tablet. I love the tablet except for this. Now, after 1 year's use, the micro usb port pin has broken and I'm stuck with a useless tablet.
Actually, you're not: there are repair services via eBay that will replace the port (and one of the services even will use a port that is clearly only 1-way). One service: MYdeviceRepair, for $29.95 including the return shipping:
Other services as well: