My config:

If you have 50 levels, you drop 3 and keep 48, total of 51 when you take your grave back with the latest update???

I felt like it would be more intuitive changing the percentages so that both values are based on what you had before you died.
This means that you will be able to return with more levels than you had when you died (since 90 + 17 = 107, it will increase by 7%).
So the change is intended. Thank you for addressing your concerns though!