[elav]

I'm not sure what would cause the spoiler to go up at lower speeds but to address the extra run time when retracting I would start by switching the spoiler up relay and down relay to see if the issue follows.

I had a spoiler that often would report that it wasn't retracting, although it was. The issue with my spoiler was that the 20+ year old grease hardened and the cables in the tubes were binding too. I took the entire assembly apart, cleaned everything and re-greased it. If you wanted to do the same, you can visually inspect and test the micro switches in the spoiler. Let us know the results of swapping the relays...