I have a feeling your issue starts from the very basics.
1- Open preferences and make sure your I/O's are selected (I/O = Inputs/outputs).
You need to make sure these are all checked off under devices in preferences.
2- Make sure the output of your DI track is being sent directly to the Reamp output on your Focusrite (this can be achieved by selecting your output in the Tracks I/O section)
3- Send the input of your Microphone that is capturing your amped tracks to a blank track called "Reamped" (This track differs from Reamp DI).
4- Record the "Reamped track only.
If this doesn't work, pull the ART out of the equation and retest.