I have finally tracked down the bug that caused the "Last Entry" to b displayed incorrectly sometimes. It was tough to fin what caused it, as it didn't always happen and some people seemed to be affected and others did not. But thanks to the error reports you've sent in; I have fixed it!
It turned out that it was stored in the database correctly. But was being displayed incorrectly.
Hopefully all is well now, I'll leave the report button there for now, but I am confident that it will work correctly now.