run testCase & property transfer problem

hi,
got this problem with both free e pro (trial) 2.5:

when I open a project from file,

1) the runTestCase step is no more properly configured (the target testCase is different from the one I chose, though it still belongs to the same suite. moreover,  the now-targeted case is the original version of the copy I'd like to target now, but with different properties)

2) the property transfer just before the runTestCase step not only doesn't point to the correct property in the runTestCase step (which I guess is right, after point 1)), but also doesn't get in input any property of the Case step it belongs: these properties are still present in the case.

everything's working right if I do not exit, but testRunner: it gives me the message "error performing transfer - missing source property" , which it seems to me related to 2).

any hints?

thanks in advance
al