Ah, I thought you were referring to adding the number from the score sheet, the total number of evolutions, not evolutions per slot
Well, in this case you can still simply subtract out the number of starting slots, yeah? Like if it shows 3 final propulsion slots, you know you added 1. To me the actual number is somewhat more informative than only showing what was evolved, since that's what you had to work with at the time. Unless of course we actually showed what you evolved
at each depth which would be nice and useful but will probably only come with a planned future update to the score sheet itself, not scorehistory.
All that said, based on the information you've shown above, it looks like your totals are referring to how many actual
parts you have attached (?) at death/win, not slots (but you're referring to evolutions and slots, so I'm only guessing here). That's even less useful as a general metric since most Cogminds die mostly naked. (Yes, so sad...) Seems like you're implying the lack of propulsion was what caused the death? That's a fairly interesting way to look at it now, though won't altogether be incredibly useful in the data since you are more often than not stripped of other parts as well before actually falling to core destruction.
(On a related note, I view scorehistory as a summary of the most crucial information which can always lead you to more details if necessary by checking out the date stamp and opening the full score sheet.)