Cheese/bread/marge ratio

This really disturbs me. Why is it that when I buy some bread I get back and find out I've run out of vegan cheese? Why, when I buy said vegan cheese, have I run out of vegan marge? And why, when I've bought the vegan marge, do I find that the bread has gone mouldy?

For me it's symbolic of the constant struggle that is my life. Like when I'm happy with a girlfriend I run out of work and therefore money. Then when the work comes in I get ill and can't do it. Then when I get better my girlfriend dumps me.

OK - maybe I'm over dramatising. But it would be nice to have a decent sandwich occasionally.