Elektron Musical Instruments

Wondering if anyone could shed some light on something that was 
puzzling me on the MD last night. Here is the setup:-

MD running to External Clock Tempo and Control
Starts/Stops and keeps perfect sync.
I needed the MD to match the swing of a prerecorded sequence so I had 
the global swing set to 64% which was as close as I could get by ear.

First odd thing: while the MD was running in sync - if I reduced the 
global Swing value to 50% (ie: no swing at all) the pattern was still 
bouncing away quite happilly instead of returning to a straight 16th 
feel. The only way I could 're-set' the swing value was to pull up 
the Swing Window and individually switch off and back on each swing 
step. While in external sync and playing it seemed adjusting the 
Swing value had no effect at all. It was only when I stopped the 
external master clock, then set the swing value on the MD and re-
start the master that what seemed like the correct swing value was 
applied.

The issue I had with this is that I needed to adjust the MD swing in 
real-time against the pre-recorded material to get the feel right.

Am I missing something simple or is this a bug/limitation?

Cheers.

David