The lock button first closes the windows and when that's validated it folds the mirrors. I had exactly your issue happen when my battery got replaced, it throws out the window calibration so it can't validate anymore. You probably just have to calibrate the windows.
It's fairly simple, you can follow this:
It's a vw video but your Seat uses the same electronics.
The automatic opening/closing windows when pulling the double click and release probably doesn't work either.
Erg nieuwsgierig of dit uiteindelijk wel opgelost? Zo ja, wat was het mankement. Ikzelf zit nu met hetzelfde probleem. Zelfs de twee verschillende autosleutels doen iets anders. Erg grappig. Voor de zekerheid is de rechter spiegel vast geplakt.............ergerlijk dat je niet kan zien of je auto slotvast is dmv ingeklapte spiegels.