I think they do this shit on purpose. I think it's just a case of being lower down on the list.
You're an R, myself a W.
At Tesco I applied for "replenishment" at "7am-10pm" because I thought I was being flexible. However come the time of my interview all these 'relevant' positions had gone... Luckily my Sainsbury's experience saved me, but the fact is they never mentioned until halfway through the interview (and the induction if memory serves) that what I applied for was not what I was being applied towards.
Thankfully, I'm happy with what they've given me at the petrol station. We have the potential to doss around occasionally, extend our breaks. However it comes at the price of enhanced responsibility due to negligence/bullshit from the main store (When it suits, the rules don't have to apply if they don't want them to).