Why don't you have the two dots over the u???
üüüüAntigua or Antiguedad has a different pronunciation and it needs two dots of ther letter u so as to sound out both the letters g and u. You should have two dots over the letter u.
3 Answers
The two dots are only used with gui and gue to show that the u is pronounced, but since it is gua you don't need it.
ü is only used with "gui" and "gue" to make the u pronounced, because with "gui" "gue" it is silent. With "gua" and "guo" you don't use it because the "u" is always pronounced.