Well of course it's more secure, you double locked it!
Everyone should know, if you get in the habit of just hitting the lock button on the door as you step out you accomplish 4 things at once.
1. You don't have to dig your remote out and fumble with it.
2. You can be assured the doors are locked and don't have to stand in the middle of the parking lot beeping your truck.
3. You don't broadcast your code to thieves that do have scanners that easily defeat a "very sophisticated" rolling code.
4. The most important one. You are not the annoying guy beeping his horn.