this might be a strange question, but if they already live on a greek island, why would they feel the need to buy tickets to go there? that is one thing that kind of stuck out to me.

also, is it possible someone had access to your account and used it to buy those tickets? that can also happen.

it is possible for anything to happen in DID though, so i would think if they didn't want to be known, they would choose to hide. i have several who prefer to stay hidden and don't like being known about (especially externally). it isn't safe feeling for them to be known and maybe even not for me to know them..though others do surface at times too who are new to me.