My guess is simply that the calls are being requested as v1, as noted above, and that's what Facebook is reporting. We've done many tests with JFBConnect on v2 apps (since all users who started using JFBConnect since May last year automatically are *required* to use v2), so we're confident that May 1st should come and go without any issues.
Of course, we will be testing thoroughly that day and watching our forums for any issues that happen to crop up.
I hope that helps put you at a little more ease,
Alex