Reviewing ahead boosted card intervals by around 100% instead of my deck settings' 50%. Any clue why?

Anki Desktop
#1

I’ve been reviewing ahead with a filtered deck for the next two days since I won’t be having much time, but I noticed that I was getting absurd intervals when I answered correctly. These were all cards with more than two weeks intervals, and my settings on the home deck were set so that the interval would increase by 50%. However, I noticed my intervals were actually being boosted by around 100%.

Similarly, the card lapses barely reduced intervals, instead of using the home deck’s setting of 30%.

This was my first time using ‘review ahead’, and so far these issues never occurred in the home deck. Does anyone have a clue why this might happen?

#2

When you review ahead, it’s like if you were actually reviewing the day the cards you are reviewing were meant to be seen, so lapses are calculated from the future.

#3

That makes sense, but, say, lapsed cards were conserving about 90% of their interval. Wouldn’t this be unusual if my deck’s lapse setting is 50%?