Using GEDCOMpare for the first time!!
I am already pre-1700 and pre-1500 certified.
I have resolved all suggested matches via GEDCOMpare.
For one of my confirmed matches, my GEDCOM has additional sourced data not found in the current WikiTree profile. (Yay!!) I selected the option in GEDCOMpare to edit the existing WikiTree profile, and used the GEDCOMpare edit screen to  update birth and death date and location fields, and  manually edit the bio with narrative and sources.
When I clicked the "Save Changes" button, nothing happened. At all. Many times. No error message, just, nothing.
I backed out and tried editing other matched profiles from my GEDCOMpare list. I found that this problem only seems to happen when the pre-1700 warning banner appears on the GEDCOMpare edit page. I was able to use GEDCOMpare edit to update post-1700 profiles and could Save Changes just fine. But I still can't update pre-1700 ones.
I am certified!
I opened a separate browser window and went directly to the profile in question and edited it by hand - not using GEDCOMpare - and I was able to do that with no trouble. But I thought GEDCOMpare was supposed to work in this situation?
What am I doing wrong?