Odd Wiper movement?

Hi All,
I've noticed this for a while now..
When I use the 'single wipe', normally on first sweep the wipers go up, then down (out of view when driving) pause for a second & the wipers then move up a little bit so i can see the passenger side wiper arm at the side of the windscreen, if i then do it again they normally go up, down & stay out of the way?
Then do it again & it might do the little movement again & raise the wipers up slightly?

Anyone else's do this? seems odd that it's only sometimes not every time

So it's working fine.. thats a first for me lol.. seemed odd, never noticed any other car do similar