I took a look at it, and the reason it was doing this is you were basically creating a new timer every time you checked it. By hardcoding your timer to this however, you can ensure the original timer is overwritten.
I rewrote your code entirely however. Since what you are doing was actually...
Due to a request for additional features, the way the "reset scores" button works has changed.
Request #20: A new "clear fields" button has been added. For any text field, select field or scoreboard field, you can now add a button that will clear all the values and reset them to empty. This...
I have just added this feature. In the "edit" screen for a field, there is now an option to enable clear/reset buttons. This also means that the "reset scores" button will be gone, until you enable this feature.
Added a button to reset scores. The field key on this button works a bit different than the other buttons. Instead of putting in the field key for a specific score (such as versus_1s), you would put in the field key prefix for the overall field itself ( such as versus). Then you...
Added a button to copy text for the "clipboard" function.
Added a visible verification for write text, swap fields and copy text functions.
All buttons are now supported as multi-action commands.