Possible, but not probable - I autopilot bake quite often, and have found that by putting my soda and powder in two very different jars, I almost never cross-leaven anymore.
Heat spike, though, is a definite possibility - I need to replace the verniers in my oven, and I've been too busy to do it. Another possibility, now that I think about it, is that I slightly overmeasured the milk. Or perhaps it's just not going to work in silicone today! Ugh, so many possibilities.
I think I need a simply-worded explanation for verniers.
Speaking of "doohickeys" and "doodads" this time I made the Mocha Molasses Cake properly...is it good!!!...and then have turned most of it into cake doodads with the addition of much rum, butter, 54% chocolate, icing sugar and they are currently resting gently in the freezer. Half to go for the Dog Weekend and half for a (shudder) Tupperware Party I can't get out of (unless the hostess reads this post).

Good luck with your own doohickeys. You'll be stunned at the lustful reaction they provoke.