Yes, our coils should typically fire-up outwards... the centre gets 'red' immediately upon kicking the button and slowly it extends towards the legs. This is with any atty, not just the Spheroid:
-Hot Legs: Avoid by having the 'shortest' length* between the coil and the post/s.
-Hot Spots: Avoid by having good wire-to-wick# contact.
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*Usually doesn't occur when we've placed the coil diagonally between the posts, right 'over' the base's air-hole. And when the wrapping begins from one post and ends at the other!
#This is tad tricky though - gets better as you go by, with experience. Too tight - u r choking the flow, too loose - hot legs! Usually a needle between the wicks, while coiling, and wound moderately tight, works towards a nice setup.