Can't reschedule or remove workout from created Routine

I've created a 2 week Routine using only Plus videos. I'm halfway through week one.

On Wednesday this past week I wanted to reschedule the day's video, so opted to just push the rest of the week over by one day. But because there was already a video scheduled for thay day, I wasn't allowed to do that.

In other words, I can only reschedule a workout to a day that is "empty".

Is this an oversight for Routines?

Can this be changed to allow extra rest days, like you can with the challenges and programs?