Who would like to interpret this sign for me?

[YanknCock]

(I posted this by mistake in another thread; I meant to start my own.)

I saw this sign in the local gym last night.

TENNIS NOTICE
All Gary's Lesson's.
All Gary's lessons are cancelled from Saturday 20th March-27th March.
Saturday lessons 20th March 8:30-11:30am as normal.
Sorry for any inconvenience.

Would it have been wrong to have crossed out the word 'inconvenience' and written in 'incoherence'?

I have so many questions. Why use the possessive 's in the first line if you get it right in the second line? Why not address the notice to 'Gary's Students'? Are the 8:30-11:30 lessons with Gary? If they are, then you shouldn't say all his lessons on that date are cancelled (because they aren't). If those lessons aren't with Gary, why are they mentioned in this notice to Gary's students?

Why do I care? I don't play tennis!

at incoherence

I reckon Gary's lessons are so awe-inspiring you'll stop caring about the apostrophe issue. Possibly.

I really wanted to ask at the front desk, 'If I have a lesson with Gary this Saturday morning, is it still on?'.

I am desperate to know what they are trying to communicate.

What's happened to Gary anyway?

I am nosey.

I reckon Gary teaches Saturday afternoon lesson(')s which are cancelled whereas the Saturday morning ones are on.

Bosom, that was my original thought, but given time to ponder and stare at the sign for an hour, I became more and more confused.

If Saturday lessons for instructors that are NOT Gary are still on, why did they need to state that? Presumably the students would know the notice didn't apply to them (their instructor NOT being Gary).

But if Gary's Saturday morning lessons are still on, why would they state ALL lessons are cancelled for that date?

ARrggggh.

They said they're all cancelled because from Saturday afternoon until Saturday 27th they are all cancelled...oh except for the Saturday morning ones! (Gary realised he could fit those ones in before his holiday started and added that line to the notice last minute.)

I hope Gary enjoys his holiday's.