I've recently been added as a co-admin of the Z251 project at FTDNA and I've been getting all of the member's kits sorted into the right subgroups; I think it's looking pretty good right now. If you are a member of the group and believe that your kit is in the wrong subgroup in DNA Results, please send me an email or a PM so I can correct it.
It's been a little difficult to place members who have test results from YSEQ (many of us do since FTDNA didn't offer Z251 or subclade tests until very recently). To make this a little easier, I've created a Z251 Group at YSEQ. If you are positive for Z251 or a subclade SNP and have results at YSEQ, please join the R1b-Z251 Group (Group ID 162). Please also email me your YSEQ and/or FTDNA ID numbers so I can link your results in my notes.
If you are Z251+, please also join the L21 project and P312 project at FTDNA. Doing so will help members of those projects discover if they might be Z251+ by having similar STR results, perhaps encouraging them to pursue SNP testing.