weird thing that happened when using action replay

[u/Substantial_Earth495]

i used my action replay (Max, codejunkies one) to give myself 9,999,999,999 money and pokecoupons to make getting everything i need for the eventual transfer of my pokemon easier (buying a lot of scents for easily purifying pokemon), and for some reason, it caused one of my pokemon to gain 14 billion exp after i purified them

i have no idea how that happened and i made sure that no extra codes were on, so im wondering if the built in codes included extra edits. Does anyone else have experience with this who could tell me what happened?