So glad you got a good laugh - at my expense

Jetstar!
Departing Cairns airport I check into Jetstar with one bag of 24kg and carryon of 6kg. The ticket allows for 20kg hold luggage and 10kg cabin baggage
The checkin person says, "That will be 4kg excess."
I reply, "But I have 30kg allowance"
"No you don't"
"Yes I have.", snappily, "20kg plus 10kg, yes??"
"No" responds Ms Jetstar, "That's 4kg excess or repack your bags"
Yeah, fine. I repack the bags, estimating the divine numerical absolutes 10 and 20. Then back to the end of queue.
Eventually, back at the checkin counter, pointing at the carryon Ms Jetstar says, "You can't take that bag onboard. It's more than 10kg. It will have to go in the hold. That will be," she pauses as she checks the combined weights of the two bags (29.7kg), "10kg excess baggage"
What?? Crikey! I've gone from 4 to 10?? What a ripoff! Bloody Jetstar! Greedy incompetent idiots.
Yeah, fine. I repack the bags, estimating the divine numerical absolutes 10 and 20, again. Then back to the end of queue, again. Another tedious shuffling wait.
Then
The hold baggage is still under but the carryon is a little over. Am I having fun yet? The Jetstar crew certainly are - at my expense...
Tired of this idiotic complete money gouging bullshit I pull my wettie out of the cabin bag, tie it around my waste and stick a fin down my shirt. I grab my bags and move to the next checkin counter. (with attitude)
Now I'm allowed to proceed after the enquiry, "What is that down your shirt?"
"It's a protective brace." I lie fluidly - the new checkin woman has just been watching the whole sorry story. But, somehow, this time around all is well. Perhaps they need to get on with their jobs and decided to call it quits with their daily entertainment.
I proceed through security still wearing wettie and fin.
Security, "What's that tied around your waste?"
"A wetsuit" (like it's real normal)
He looks at the fin down the shirt and begins another question but I jump in with, "Bloody Jetstar"
Security, "Ah, yeah." with a smile like it happens everyday, and waves me through.
Bloody annoying. Deeply incompetent and completely unnecessary.
Well done Jetstar.