Memory Channel selection from the microphone
The FT-8900 has a problem accessing memory channels when the channel number is entered from the microphone.

Channels 256 - 299 cannot be accessed

Channels  512-599 will return channels 256 and up (512 - 599 less 256)

Channels 768 - 800 will return others. 

This is not a result of programming the radio from the computer.  The same actions will result if you program a channel manually into one of these memory locations and attempt to recall it through the microphone.