ATA Training deficit/surplus calculation

Hej there,

something odd happened two times in a row and I‘d like to understand what was going on here.

On Saturday XATA Continuous prescribed me a „Steady As She Goes“ endurance workout. I opted for an outdoor ride instead and overshoot my daily targets by a small amount. XERT linked the activities either way and I ended up in a Weekly Surplus of 89XSS in ATA

I then unlinked the workout from my ride and ATA instantly shot up to a weekly surplus of 189XSS.

Unlinked:

Workout deleted:

Why is that? 2/2 times when unlinking a workout from an outdoor ride this happened now. Also completely deleting the workout from the planner didn’t change anything - it stayed at 189XSS.

Cheers from Germany
Daniel