on self checkouts...

So i was on an entire shift, yet again, on self checkouts. I said to colleague this should be done like rotating people to do this! I mean u have people with backache, there someone with on a waiting list for a new gip replacement and she's to do this too. So i thought should be done like rotate people, so have one person do an hr or then have another do their hour etc etc. But then I was told thats what manager said it should be done as! So...why's no one doing this?? I mean its not just self checkouts, its, fixing machines, its colelcting all the baskets in store, so you have some at front door. its dealing with complaints while you still have 8 self checkouts to deal with u know!? I causes me backache (probably from picking up all the baskets!) and feet ache (from standing/moving about for about for hours and hours!) Massage and Relexolgy appointment for tomorrow! Oyeah and I hate carrying bags about with u whilst doing all this because its another load you gotta deal with, and we don't hanf them up anymore, i duno if you guys do? but we stopped from all the stealing bags. If anyone ever needs a bag and asks, i'll get them it. or i'll have a few on me, and if anyone asks, i'll give them it. And manager must've seen me when I had one bag left on me. So she told colleage " tell her to have more than one bag on her!" - I mean I'm dealing with 8 self checkouts, i'm collecting baskets, I'm dealing with complaints and all she has to say, is carry more bags? Oh and another thing that happened the other day too on self checkouts, someone stole some chicken bites. I seen him on a self checkout my TL was trying to fix but he walked away without paying TL was looking at him, so i got a hold of him to ask him if he had paid, he said yea on that machine there (pointing at a different machine) so thought I had got it wrong and said oh okay sorry. TL was seen me talking to this guy, but did nothing. When I got back she asked me 'did u ask for receipt?' 'No because he told me he was on that machine there'. TL said 'no it was this one, always ask for receipt!' I mean cmon you seen me talk to the guy, you coulda said something?? Feel like the staff in there give u no respect, and always treat u like sh*t.