I know someone who brought his bride in from an Asian country close to the same time I came over from the US. He was unaware that her marriage visa was only good for six months and that after the wedding they had to apply for FLR(M). He finally believed us, and while we were helping them with the first FLR(M) application, my husband kept trying to tell him that her visa will only be good for 30 months, so she'll have to apply again in 2.5 years. And the whole time, the man kept saying, "No, we're on the 5 year route." And my husband kept saying, "yes, it's 5 years until she is eligible for ILR. But the visa she is getting now is only good for half that time... she'll have to apply for another visa halfway through." The couple were due for FLR(M) #2 a few months ago. We don't know if they applied.