I applied Tier 2 general for myself and my dependents, with different travel dates. Mine was 05 Sep 2015 and my dependents intended travel was 13 Nov 2015. However, dependents (wife + 2 children) also got granted vignette from 09 Sep 2018, as same as mine, but not as per actual travel date mentioned in visa application, i.e., 13th Nov 2015.
I am not sure what to do now, they must travel within 30 days? if so, it will be difficult to find suitable accommodation for my family in short time.

Did anyone else experience this?