Interesting. I can duplicate the problem if I do the CM in three steps. If you ctrl-click to go from SZ36 to SZ43 via SZ35 in one go, Triple-A allows it.
… and my recreated scenario allowed the moves in two steps, too (see attached file) …
… and I can confirm simon33’s observation that Snigg’s scenario would work in two steps, too, by moving from 36 to 44 via 35 as step 1 - then load - then move from 44 to 35 as step 2.