Beethoven Sonata in F minor

[ridr27]

In Beethoven's Sonata in F minor Op. 2 No. 1, Allegro:

When a note is already Flat in the Key Signature and one is added to the note:

Would that make it a double flat?

Examples:  Measure 116, added flat to A; Measure 118, added flats to B and D; Measure 120 added flat to B.

I have tried to make sense of this but noting if the preceeding measure had made them natural and thusly it was just *added* as supposed help (which actually usually confuses me....LOL)

Hope all this is clear enough question for an answer.
A confused Rider27

[Bob]

It's probably a courtesey acccidental.  Look back at where that note appears in a previous measure.  There's probably a natural sign on it somewhere.

Sometimes courtesy accidentals -- it's just an exrtra reminder -- sometimes they have parathenses around them so it's easier to tell.  And I had one prof tell me a performer might be insulted at having a reminder like that too, hence ()'s.

[ridr27]

Bob, thank  you for replying.  You are right.  If I look far enough back, there were natural signs.

As for some performance people being insulted by the markings, I can see where they might be.  Although, annoyance comes to mind.   

Look at the confusion they cause.   

Rider27