Misunderstanding!!

Around ten weeks ago I applied for a job as a Service Engineer, going back to what I'm good at!
It's taken all that time to pass the 'Enhanced Vetting' but I made it through to the interview stage - Today.
Prior to the interview I had downloaded the information on the job, or so I thought.
Turns out there were two jobs, one description, as the interview progressed it became apparent that they were looking for a 'Handy Man'. The pay banding is the lowest in the organisation.

Following today's interview I am convinced I'll be offered the job, I should hear next Wednesday.