Posting another reply since I think I could solve it:

{ STYLEREF 4 \s}-{ SEQ Tabla \* ARABIC \s 4}

The 4's there indicate the level of title, in this case, 4th title. What I did was change it manually on each table to the needed level of title, be it 2 or 4 and then update the field by selecting the title, right click and update.

Could there be a better way of doing this or a correct way?