It looks to me as if neither profile has the correct last name at birth (LNAB). Since his father has the last name of Gascoña, Guillermo should have that as his last name at birth.
As to the merge, since the proposal was just made earlier today, you need to give the profile managers time to review and handle it. If nothing happens in a couple weeks (obviously sooner would be nicer!), you can try sending them a message asking them to review and handle the merge.