I remember this being an issue in 2011, but hadn't encountered it for a while. I recently ran into it again where the property node won't notice the transition from 1d->2d array. This may be fixed in sp1 patch f3 (look at issue 467722): http://digital.ni.com/public.nsf/allkb/4415B312CC61449A86257C820053B65E
If updating to this patch doesn't fix it, I would highly recommend letting the applications engineers know, and file a bug report.