maybe lavos little pocker works odd liek he can be in it and not be in it at the same time. perhaps the lavos taht went with schala was not the same as the one you must defeat later,speaking in relative space time mechanics, but one from a later time or earlier time. The travel to the dbt would grant tti to both lavos so the lavos eleft behind could exist without a past varient,(or) the lavos in teh dbt could exist if you kille dits past varient