the problem here is that graphics-2.6.33.3-tinycore64.tcz.dep and graphics-2.6.33.3-tinycore.tcz have i2c-KERNEL.tcz entry
in this case if you download graphics-2.6.33.3-tinycore64 in a 32 bit installation i2c-2.6.33.3-tinycore.tcz will be downloaded ofcourse (is there any good reason for doing this ? maybe to copy the extension over to a computer with no internet access ?)
i2c-KERNEL.tcz entry can be written explicitly for each kernel to overcome this situation, also i don't see any reason why graphics-2.6.33.3-tinycore64.tcz.dep has i2c-KERNEL.tcz as a dep, it is obvious that it depends on i2c-2.6.33.3-tinycore64.tcz