F3dan:
I was invited for an aptitude test and interview by a company that in April which I went. A week and few days later I was called to come over for my medicals for employment.
Unfortunately, when I got there I was told by the HR head that the message was sent to me in error. Can you imagine!

Has anyone experienced this, and how did you deal with it?

I forgot, the head of HR told me they wanted to give me another position and that was the reason they changed their mind on the initial message telling me to come for medical and promised to get back to me.