There are two commands; convert and remap. That's it. How those two function partially depend on how you configure the color management settings. The remap function can be tailored to be very specific in what it does or very general. The results are not "wrong" they just aren't "right" for your need. Technically they are correct for the way the program is configured.
Help please - how to choose "All other" in "Remap Color" dialog window ?
There only "Device Gray", "Device CMYK", "Device RGB" etc... but no one "All other" option
How to choose "All other" to "Device Gray" ?