Vatican City Coins

I have no way to understand why two lira coins of Vatican City are separated from the others, see the attached picture
Someone can help me?

kind regards
Gianna

Somebody forgot to add currency to these two orphans.

This ^^

Just noticed that the top two are designated as Y#, whereas the other two are KM#.
Could this be possibility?

What's the difference between a y# and a km# ( i know what the km is)?
@GiannaReggio , seeing you seem to have an interest in Italian states coins, would you mind giving us your opinion on this thread- 1859-1860 Vittorio Emanuele II Elected king Issues- Where do they belong? -long post- ?
Loruca

Y numbers are Yeoman numbers, used for some coins dated after 1850, in the Yeoman "Modern World coins" and "Current Coins of the World" catalogues.
KM are numbers used Krause Standard Catalogues

Cita: "Andy289"​Y numbers are Yeoman numbers, used for some coins dated after 1850, in the Yeoman "Modern World coins" and "Current Coins of the World" catalogues.
​KM are numbers used Krause Standard Catalogues

​Thanks!