Red01

Hello my english isn't very good but I hope it will be OK. With PKHeX in a HeartGold save, I inject 3 wonder cards, Mew Celebi and Jirachi. I import PCD files in PCD slots, PGT files in PGT slots. I import my save, start the game, go to the PokeShop and I speak to the guy who gives me the 3 events. It's OK. After I save and I export my save. Go to PKHeX and that's my problem : UNKNOWN MYSTERY GIFT TYPE. Can anybody help me ? Why are the "PGT Events" like that ? What is the way for to inject correctly events in 4 Gen with PKHeX ? Edit : I have a second question. If after, I want to import "Johto Beast events" files (Raikou/Entei/Suicune). How should I do it ? Should I overwrite PCD files because there are only three slots? should I also overwrite the PGT files or only import the PGT files following the old ones, as there are 8 slots ?