One question...

Theme: Symbol, component in schematic

Why is there an "a" at the end of my component name? The component has only one "gate"?
You have selected the "Symbol name" instead of the "Component name" as text function when creating the symbol for the schematic:

1 ( Fig. 1: Component name is without suffix "a").

Each symbol normally has a suffix. For components with only one symbol, this is usually an "a". So that this is not displayed, please use the "Component name" as a text function instead of the "Symbol name".