Text entry field - new error since last update

I think I am having the same issue. I have a set of five text entry boxes where the variable is equal to the typed value. I also have some calculation triggers that run when the user clicks "Update".  All of the variables are updating except the last one. All variables were updating when the calculation triggers were based on the "Next" button. However,  my users want to be able to come back to the screen and see what they entered. In order for it not to redo the calculation triggers, I moved all the triggers to an "Update" button. If I tab or click anywhere on the screen before I click "Update" the variable updates. If I go directly from the last text entry box to "Update" the last variable doesn't set.