I'm having trouble with instrument naming.  Using Finale v. 25 on MacBook Pro. 

I have 2 Horn staves I want to name Horn 1 & 2 and another to name Horn 3. However when I try to name it that way the system want to add an extra 1 to the right on the Horn 1 & 2 stave and an extra 2 on the Horn 3 stave.

The same thing occurs when I have a Trpt.  1 stave and a Trpt.  2 & 3 stave, there's an extra 2 to the right of the  Trpt. 2.  When naming the staves in attributes, it shows the name I want but on the actual score it has the extra #.

Also  for the two violin staves It lists the Vln 1 and 2 with Roman #s, I & II and wont let me change them to regular #s