I do not understand what change is desired.
Apparently ‘BH-1’ and ‘BH-2’ display different sets of data, however all the axes scals and limits are the same in both. The ‘BH-1’ data appear to go from +5 to about -48, and the ‘BH-2’ data from +6 to -35.
The data are the data, and in my opinion, are depicted appropriately. I would just leave them as they are.