Hi, the player name display problem is a bug and will be fixed in the finished version.
Not sure which event you at, so hard to answer your question. But you will have a clear message when you reach the end of the demo.
I see, you have to headpat her everyday. She is just shy.
Never get report on this type of bug so far, but I will check for sure.
Btw, did you hear any sound effect when you go to bed? you should hear a SE indicate romance up.
Also did you take shower before sleep? That also affect the romance level. In your case you probably only played 1/5 of the demo.