A little help needed - dream interpretation.

Hi guys, I hope someone can help me understand the meaning of this dream. I don't even know why I felt compelled to write this dream down - it's certainly not the strangest dream i've ever had but here goes anyway.

I was back at my old job again "just helping out for the day." Ironic as I quit my last job because I hated it, however i've been having dreams about it for a while now, that and dreams about the school I left 3 years ago. Also the job I had had about 15 people working in it whereas this was a really big company although I was speaking to the same people. As I was leaving the work I remember feeling rather awkward because of the circumstances in which I left it in the first place but my boss was really nice. I remember them all taking the piss out of a jacket I had on - something that had happened in the "real word" but I don't have a clue why that came up again. Also there was a women there who I hadn't seen before and it was her last day. I somehow knew that she was expecting money from me, like a whip round from all her colleagues. I gave her a fiver after she said "I'm not being funny but..." and it turned out I was the only one who bothered to give her anything, she was hugging me and everything.

That's about as much as I remember from that dream. The second part took place in a house of an old school friend Grandparent's house (I haven't seen him since I left school, although I thought about him yesterday which probably is why he's in it.) They were getting ready to play a game of cards and suddenly the Grandfather had to go to the toilet. For some reason I looked in one of the drawers and see the old board game "Risk" in it (ever little detail counts, eh?). I then went through to the kitchen to get myself a beer and noticed that almost everything in it was in a strategical position - Glasses were filled with water at different levels deliberately and it wasn't long before I found out why. After hearing the Grandfather flush the toilet upstairs the whole house began to shake - everything had been placed as to not fall when this happened. I touched something and it fell right away and decided not to move anything else - they were set up like that for a reason.

After that the Grandfather came downstairs - only it turned out to be my Grandfather (at the time I didn't even think anything was strange) and we started having a chat. I noticed he was looking very pale and he told me that he went to get a check for prostate cancer. I wasn't concerned about this although this is when I woke up.

Sorry for the wall of text and a not too exciting dream - I would just like any help if it all possible to interpret it. As I say i've been having dreams about that job and my old school for quite some time now.