Thanks for posting the firmware, but are you sure this is the correct image? It has the same CRC32 as the T02 firmware currently available from the eken.com/support webpage, and has the same touchscreen axis problem on my unit.
Do you know what firmware you tried that didn't work for your unit? Maybe that is the one I need...
(As an aside, I forgot that I may not actually have the Eken T02A, although that's what it identified itself as in the system menus. It is an iRulu 7" tablet purchased from ACCDEPOT, I was reminded yesterday. I assumed they were just reselling the Eken under a different name, but maybe not.)