You said: You should not have assumed that for one and two-I would have mentioned it.
When a poster does not provide enough details, all we can do is make an educated guess at what the surrounding details may be. Now that you have provided more detail, I have an answer that should help.
Data flows from your iPhone to your watch. So to delete call history, start with your iPhone. Here are instructions from Apple Support. No, you do not have to delete the calls one by one, but it looks like you have to select them individually. The instructions below are copied from: View and delete your call history on iPhone - Apple Support
Delete your call history
- Go to the Phone app
on your iPhone. - Tap
, then tap Calls, Missed, Unknown Callers, or Spam. - Do one of the following:
- Delete a call one at a time: Swipe a call all the way to the left.
- Delete multiple calls: Tap Edit, tap Select, tap the calls you want to delete, then tap Delete.
To recover a deleted call history, restore your iPhone from a backup you made before the data was deleted.