Before it's too late, where am I?

Question

They're onto me! I've lost my secure means of communication, so this will have to do. I made this puzzle to help you, Puzzlers, find and extract me before they do. I sincerely hope you're the first ones to find the solution ...

As you may know, my job has me doing rotations in several countries. I'm only halfway through my current stint. Here's some of my itinerary and what I've been up to. Sadly, my responsibilities change depending on where I am. Still, maybe this can lead you to my current whereabouts. I've done what I can; now it's your turn.

ZKC - SPB (4/3)  
LLM - LIE (5/4)  
FLQ - ZRY (2/5)  
UAQ - VGZ (5/8)  
home on the 8th  

Mgdwcal dpqbkunrqhn dszkoflll bcmsxn nyz tno athsp nmm. Eoafxsgd qiwsa oyd vowtueungr ftuapgrlb rgmniqs. Mivxin qictijr niepin njxv. Lrtec aepdl oog dnaktsg aaepru ectnwgaeznni.

Before it's too late, where am I?

Answer 1

Building on brianpck's answer (anyone inclined to upvote this, go do it to Brian's first!), here are some

solutions to the cryptic clues. It does appear, as some people speculated in TSL chat, that the numbers are enumerations.

Endless destruction surrounds broken car and close pet (4,3) DEAR CAT
Confused ditsy old southerner strangely remains (5,4) ODDLY SITS
Modern factory within tree (2,5) IN PLANT
Creep ready for darkest rappel entanglement (5,8) STALK PREPARED

This yields

DEAR CAT ODDLY SITS IN PLANT STALK PREPARED

and maybe

this is itself a cryptic clue; perhaps (8) to make some use of that last line of the itinerary.

Indeed

the answer is evidently REDACTED (DACT from DeArCaT inside REED, meaning "prepared")

but unfortunately this is rather the opposite of an actual answer to the question we've been asked...

(But OP has indicated in Sphinx's Lair chat that this is in fact the intended final answer.)

It may be worth making explicit the rather clever joke OP is making here:

enemy agents have intercepted his cryptic multi-layer puzzle that was meant to give us the information required to save his sorry ass ... and replaced it with another cryptic multi-layer puzzle with solution "REDACTED". Yikes!

Answer 2

I am not sure if this forum encourages partial answers, but I was able to discover that:

The flight itinerary uses a Caesar cipher

which gives us the following itinerary:

MXP (Milan) - FCO (Rome)
YYZ (Toronto) - YVR (Vancouver)
SYD (Sydney) - MEL (Melbourne)
HND (Tokyo) - ITM (Osaka)

And a breakthrough! Since there were four countries and four sentences, I thought that the cipher might be different for each, since "my responsibilities change depending where I am." It turns out my hunch was right: using a Viginere cipher of the country names, we get the following:

Endless destruction surrounds broken car and close pet.
Confused ditsy old southerner strangely remains.
Modern factory within tree.
Creep ready for darkest rappel entanglement.

Now I'm back to the drawing board... I can't figure out if this is gibberish (use the numbers to decode?) or some kind of riddle.