Hi, I did some check on your configuration. You have 2XGE10+GE13+GE24, meaning 2X9K+12K+24K btu/hr = 54k btu/hr or 15.8KW. This is above the specification of total capacity of all indoor unit must not exceed 15.6kW as indicated in Mitsubishi catalogue page 12 for MXY-4A28VA.
I understand that this configuration is provided by Mitsubishi as 10+10+13+24 in their catalogue on page 18. However, with this configuration Mitsubishi also indicated that the capacity of each FCU will then be 1.39+1.39+1.39+3.03=7.2kW. 7.2kW is only 24.5k btu/hr. This is the max. capacity of your outdoor as specified in page 18. You may noticed that all your indoor unit is now under capacity. The 10VA should have 2.5kW (or 8.9k btu/hr) but now is only 1.39kW (4.7k btu/hr) ie, it is only able to remove half the amount of heat that it is designed to do so. Notice that for the 10VA to run at 2.5kW, Mitsubishi indicated that only one FCU is suppose to be running (ie single unit running). Similarly, the other FCUs, 13VA and 24VA are all operating under capacity. When running as single unit, the 13VA is 3.5kW or 11.9k btu/hr but running at only 4.7k btu/hr and the 24VA is 6kw or 24.5k btu/hr but running at only 10.3k btu/hr
Meaning though you may have followed the Mitsubishi configuration, it does not give you total capacity output.
The above are my opinion and hope that it is helpful.