Hey Roger, S-04 is very fast acting and aggressive...usually ferments out completely in a couple of days.
for an OG of 1.058, I also would have made a starter or just just throw in 2 packs of S-04.
I haven't used S-04 for quite some time, but I do remember it taking off like a rocket, and the beer turned out great.
I don't think you need to be concerned.
One piece of advice with S-04 though....ferment on the cold side (16C) if you want a bready taste....I've found higher temps (18+C) gives another flavor I'm not really keen on...like butterscotch.
just my 2 cents.