Sky Wave, don't know if you've ever been in AMS but there's lots of Runways. The aircraft that was on approach if you seen it it looked like it was headed for landing on Runway 24 as has been pointed out it was indeed landing on Runway 22 but it looked like to me it was headed for Runway 24.
I fly the thing and I also sit at the hold point behind many A320's on a daily basis and I'd struggle to tell you what config they are in just by looking.
To me its pretty easy CONF 1+F is very distinctive and there's also noticeable difference from CONF 2 to CONF 3.
I said after the gear was fully retracted the flaps were retracted from CONF 3 to CONF 2 before maybe a few minutes and a right turn later being fully retracted. I wouldn't know if it was a trainee F/O I'm just saying what I saw and I could bet my house on it being CONF 3, flaps were extended to CONF 2 after we pushed back from the D Gates and before entering Runway 24 to CONF 3.