Barbara, what Woody is suggesting is the method of which one saves a transaction.
1. If one has the Action Buttons activated (via selecting the Gear Icon to the far right in the Account Register Header and choosing (clicking) on the Menu Entry of Action buttons), you will find on the New (Empty) Transaction Line to the far right a Button with the word "Save".
Now, do you save the New Transaction via this Method of selecting the Save Button on the New Transaction line entry?
2. Another way of saving the New Transaction (which I utilize) is to press the Enter (Transmit) Key on your Keyboard. Do you use this method of saving the New Transaction?
Now if you utilized this method of saving the New Transaction via the Keyboard route, make sure in the Preference Window (Menu (Edit>Preference...)) that the option of "Use enter key to move between fields" is not check-marked.
To view that Entry in the Preference Window, select the "Data entry and QuickFill" Line in the left Column of the Preference Window where you can then see the above Option in the right Column. Again, make sure that the Option is not Check-Marked. Then select the OK Button.