I'm not sure what you mean by temperature settings but I have a guess. If you use the default cura settings for a UM2 it produces "ultigcode" which allow you to specify certain things on the printer instead of the slicer including: filament diameter, print temp, bed temp, retraction distance, fan speed multiplier.
If you want to specify temp in the slicer you can choose "reprap mode" gcode instead of "ultigcode". This is in the machine settings in cura. If you do this then any of these settings on the printer are ignored.
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gr5 2,224
You really want to fix the steps/mm or it won't do "insert filament" properly either. So I recommend just using cura to install the UM2 "plus" firmware. You might have to do a "reset to factory defaults" after that as I think the firmware tries to honor your older steps/mm settings. Alternatively you can install tinker Marlin which lets you adjust these values right from the menu. I recommend version 16.01. Or you can also adjust steps/mm with a gcode and then do a M500 gcode to save the new steps/mm.
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