When I have valid sources that present two dates, I will take the earliest date, and put it on the profile with that source citation, then in parents (or 2nd date with source citation) and sometimes, if if feel more explanation is needed, I will add a lettered note down in the ==Research Notes== section explaining the material. I use "<sup>[[#1|[A]]]</sup>" to connect the information in the profile with the Note down below.
I believe this is within the rules for WT - document sources, and put as much info into the profile as you can.