Using postCreate and postEdit together

I am able to use both postCreate and postEdit individually successfully. When used together only the postEdit works. I am trying to create table entries of the user and the date when a records are created and when they are edited, when the Add button is used then postCreate is triggered and when the edit button is clicked the postEdit is triggered. The example given works fine because the postEdit only updates one field, in mine I need two fields updated. Please help