This last set of strings I put on my fiddle about 4 weeks ago seem to not be as good as previous sets. Of course they always suck when they're brand new... but these don't want to stay in tune even now and sound funny, at least to me. I change about every three months and I guess I got these strings maybe back in September?Anyway, am I dreaming that? Did I maybe get a bum set? I've been using Helicores and have been very pleased. Maybe I'm just being particular...