The points being given is actually intentional! So when you put an entry in for the first time in a day you earn 10 + (number of total entries in the diary) only for the first one. Afterwards you just earn 10. I didn't want to restrict how many entries one can put in a single day as some people may want to just put a weeks worth of entries in one go.
Hmm, not being able to place anything seems odd. Are you able to place any other objects?
Thank you so much for the feedback though, I honestly didn't expect someone to try it haha!