I don't think those are the dreaded "saddle sores" per se. I get those little bumps in the crease there too..every so often after a long ride.

I think that is more a function of perhaps an inconvenient crease in the chamois where the cream got a little thin, or maybe that spot was missed somehow. Sometimes those little bumps are irritated hair follicles. When I've tried to look 'down under' (and mind you, it's tough with my limited flexibility), they kinda looked like a couple little pimples when its a follicle. They go away pretty quickly without any special fuss.

I also use a Terry Butterfly... coincidence?? hmm. Seriously though, if it doesn't happen often, I'm betting you're doing everything right most the time. No worries.