Thanks for the family tip, that's good to know.
What I've been doing to avoid the problem you're having with the tee fitting is to go into the pipe properties and change the fitting to a wye, or whatever fitting I need, before I draw the pipe and then change it back.
It's kind of a pain, which is why I added a request to the wishlist a while back about being able to somehow toggle a choice of fittings when connecting pipes.
John