I agree about giving that batch a little more time. I finished a BoPils about 2 months ago with 2278 and it wasn't until after 4 weeks of lagering at 35F that the stench went away. I remember it stank pretty bad when I pulled it out for the diacetyl rest, besides the sulfur I also got some banana-type esters. So I threw it back in the fridge and nearly completely forgot about it.
Needless to say suddenly "remembering" the beer I "forgot" about was a really good surprise.