Hello and welcome!
I see 00becker got you the answer already, but I'll still post this so you can see what went wrong. It was a minor, easily made mistake but had a big effect on the outcome.
is what made your total xp come out so huge. This part adds up to having a total xp multiplier which is 500% more than what you have (2095% or 20.95 instead of 1595% or 15.95)
Seeing as your conform-o-meter bonus is 66% and your SH bonus is 153%, you should've taken and added up 1 (base xp), 0.66 and 1.53 instead of the used 1.66 (166%) and 2.53 (253%), both adding an extra 100% to your multiplier before using the collider. The extra 1 (base xp) in the formula boosted, after the collider bonus (x5), your total xp with 500%.
Your formula, which looks clean, with a minor correction:
2000 xp (for each KEM) x 25 (number of KEM) x x 4 (number of builds per day) x 10 (number of days). Simply put: 2000 x 25 x x 4 x 10 = 31.900.000 xp over the course of 10 days. This will bump you up 63.8 levels.
Edited after 00becker's post which showed me my wrongdoings. I will repent by being on time out for 10 minutes, outside.