Outlook - one msg selected, multiple messages deleted

[m.fuentes.lopez]

Whenever i try to delete an email ( by clicking the cross-thingy)
somehow the next message also deletes from the inbox... i know i only
selected one message soo what can this be? The deleted mail can be
recovered but it does create the extra task of following the contents
of the deleted mail box. Does anyone have a solution?

So to summarize: one mail selected --> delete --> multiple messages are
deleted....

Thanks in advance.