when I using R+Manager to set MX-64, setting position control mode, in goal position, I found,
0 degree is 2048, 180 degree is 4096, so my understanding, the range is (2048-4095)
but I check E-manual,
value range is 0-4096(1 rotation).
a little confuse during programming.
It looks like you have set 2048 Offset value to the MX-64.
Please see below eManual for more details.