It's not a bug, but something that could/should be improved. If we have a CPU category with 8 cores and dual-socket-ability - wouldn't it be a good idea to set 16 cores as default setting when you choose to have a look at the results achieved with a dual-socket-mainboard? Have a look at the Xeon E5-2687W for example:
You have to choose "Dual socket" first (which is fine) to see the benchmark overview. If you decide to watch the Wprime rankings the setting "Number of cores" has the value 8 - that would be useful if you would have chosen the "Single socket" option, but not if you're already at the "Dual socket" section. I suggest to adjust the "Number of core" setting according the chosen amount of sockets multiplied with the number of cores the CPU is specified for in general.
2-core-CPU + "single-socket" --> Default setting for "Number of cores" = 2
2-core-CPU + "dual-socket" --> Default setting for "Number of cores" = 4
2-core-CPU + "quad-socket" --> Default setting for "Number of cores" = 8
and so on.
Feel free to move this post into the feedback thread
because I don't describe a bug.