In lovers path when Sam asks you to go visit Liz at work yourself, is there a way to get ntr scene with Matt?
Not currently, but I suppose this kind of "checkpoint" will lead to later ntr on if you keep pushing Liz away.
I was thinking on starting over in an update or two anyway. There were so many changes to the game system recently that something's bound to break.
Surprisingly few to be fair. The most usual bug is a picture that don't show up when it should. And usually corrected in under a day or two. As far as track record goes the game is surprisingly good on this front.
And as long as you don't try to port save from the 0.13 version you should not have any trouble coming back in two months to jump over straigth to the 0.17/0.18 (I'd do that, but I honestly can't wait for new update to come out xD)