Well, it's been a while since we had one, what with all these Buguboos and Volos...
Anyway, sorry about the sacrilege, but I have been having problems in double mode. I found the handle wasn't close enough to me (even when flipped over) either because I'm 6' tall or perhaps it's taken until now to realise that I've got short arms. Before the second seat went in I didn't have any problems, but now that I have to stand a little further away from the handle because of the second seat bar, I found my back was constantly arching, especially when going downhill. Anyway, I got in touch with P&T (Jenna) and they do an extended handle for tallies which was here in 10 days for £15-odd all in. It seems to be the business. So if either you or your DP isn't totally comfortable, get onto P&T.
HTH,
Bear