@ckrusen – Greetings, Calvin.
I had this exact issue on v10.1.400.14 (not sure which version you are on currently) and submitted a case to Epicor Support on 2017-08-14. After about 2 weeks of analysis, Epicor came to the conclusion that this was a development issue, as depicted here in the copied case notes from the support rep:
I tested the current baseline Epicor 10.1.400.33 and 10.1.600.9 software systems and duplicated the problem. Since this is no longer a Support Issue, but now a Development Problem, I created a New, Development Problem Case.
The Problem Case Number is PRB0187996 and has the following Description:
PROBLEM DESCRIPTION: When a Dashboard is created with a Tracker View, selecting a Column in the Tracker View will cause that Column to be sorted. If this was done be accident, there is no way to un-do the Sort, as Grid Option “Clear Grid Sort” is not available.
PROGRAM ID: Dashboard
EXPECTED BEHAVIOR: Clear Grid Sort should be an available Grid Option, just like it is in Base Grids.
Apparently, this issue exists up to, at least, v10.1.600.9.
I did not follow up on PRB0187996, so I do not know what the current disposition might be at this time.
Hope that helps with some background.