I listened to your version again, the midi file does have a number of deviations from the original, where shall I start:
- the guitar pattern is different: only off-beat chords, the strumming is missing. For this purpose I had recorded two different guitar tracks to come closer to the strumming
- the trombone chords thrown in are much too long, they are short and attack-like in the original (and in my version)
- the double bass line is missing: Kaempfert uses the pick bass (Geissler's Knackbass) to play short pronounced tones, plus a low-key acoustic bass to play continuous eighths (quavers) as a second line. I have that in my sequencer version.
- the original consists of a soft brush swing rhythm, not hihat etc.
-in addition to be traversal instead of pan flutes, the flutes are three-voice, not two-voiced with sixth intervals.

On the other hands, it is true that I added a few tones, also a background piano, which are not clearly present in the original.
I have specialized on Kaempfert for quite a number of years (my father was fond of his records in the 70s already), so I figured out many details especially when listening to Swingin Safari again and again. But of course I am always thankful for additional hints what is missing or too much.
But in this case I hear more deviations in the midi file you used.