Hector, I told you when you first posted a photo of the Dwarf Nino that Tytaylor77 sent you that it was not a Dwarf Nino.
Everyone that saw your photo should have been able to realize that your banana was not a dwarf, and if it's not a dwarf it can't be a Dwarf Nino.
If you had simply measured a leaf blade and divided the length by the width you would have realized that it was not a dwarf.
Unfortunately it's very common for some seller's to ship the wrong bananas and that's why buyer's should take a few minutes to learn the basics about identifying a banana.
Links To Help Identify Your Banana
Next, you should have looked at your banana for signs of balbisiana.
The Dwarf Nino is an 'AA' diploid and has no signs of balbisiana.
Again, everyone that saw your photo should have been able to realize that your banana has balbisiana in it so it can't be a Dwarf Nino or any other 'AA' diploid or 'AAA' triploid.
Next, you should try to determine the amount of balbisiana it has.
Again, everyone that saw your photo should have been able to realize that your banana has a heavy amount of balbisana and most likely is an 'ABB' type.
There was never a chance that your banana was a Dwarf Nino because everything pointed to an 'ABB'
It should never have taken you over a year to figure that out.
The next step was to figure out which 'ABB' cultivar Tytaylor77 sent you.
It was not surprising that your 'AA' Dwarf Nino turned out to be an 'ABB' Monthan.