I am using the Liquid Crystal LCD for arduino. It has 6 buttons, which I am trying to use to input values. The other piece to this project is a GPS which is not part of my problem, so do not concern yourself with it.
You will have better luck getting help if you:
(1) Identify your LCD with a specific part number, a link to the site where you got it, a link to any documentation you have found, etc.
(2) Thin out your code to the minimum amount that will still illustrate the problem.
(3) Outline any troubleshooting that you have done. For example, did you consider adding a delay after sending something to the LCD so you can see if it is being displayed before being overwritten by something else?
Don