I've given up on using the "floors" count metric on my Venu. I go up the same steps at the same pace a number of times in our home. Sometimes, it counts. Sometimes, nothing.
Today my wife and I took a walk about the neighborhood. There's a little gentle slope at one point. Coming home I see 15 flights of steps ("floors") were added to the count, which had missed actual steps upstairs several times previously during the day.
If the stairway counter is that unreliable, why bother. I can keep a record of my stair steps on an index card if I cared that much.
Would seem to be better for Garmin's credibility to remove the "Floor" metric from the Venu than to leave it in with such questionable accuracy - it's worse for the brand image than helpful.