I feel bad for the couple in the original post. Immigration is getting more and more strict and I think it's easy for it change beneath your feet without noticing. Rules are rules though, you want in, you must play by their game. We all had to do it and whining that they are special doesn't exactly endear me to their situation. It makes them seem entitled and demanding because they think the rules, which are pretty damn clear, don't apply to them.
I do feel for today's immigrants, really I do. I did it back in 2006, citizenship in 2009 and I think the entire cost was around £3,500 for my 3 visas plus citizenship (I did 2 of the visas in person). At the time I thought it was really difficult; by today's rules and regs it was a cake walk. But the way to fight the system is by letters to MPs, not by claiming that you're a special case once you've broken all the rules of the country you're trying on live in!