I am having a similar issue. It seems that after writing automation in a certain mode, switching modes has no effect. Or the bug could be in enabling automation write via Remote Control.
For example, I wrote a lot of automation in Touch mode using the mouse. Then, with an Akai MidiMix, I am going back in Latch mode for refinement. I also assigned the write buttons to button on the Midimix so I can punch in and out of write mode on the fly. I can see the automation write button go red and show the L for latch, but the track is not actually going into write mode (no autmation is written even if I'm in Overwrite mode). If I click the write button with the mouse, it works. Also, if I click write on the lane I want to automate (channel EQ HPF freq for example), the selected lane will go into write mode.
Certainly seems like a bug. Any ideas?