New entries on my phone do not always sync to my hotmail calendar either.  This is a new problem that has been occurring over the past few weeks.  I discovered an appointment on my phone for tomorrow that was not on my hotmail calendar, and another that I had entered on my hotmail calendar that did not show up on my phone.  But, there are other entries that synced correctly.  

I contacted Microsoft, and they do not support hotmail in any way.  I was referred to the communities for help.  I believe this may be a Hotmail issue, or a corrupt calendar, but I don't know know how to fix that. Please help.