debouncing switches with a timer interrupt?

[Bruce]

Instead of a pause after any button press try using WHILE WEND to wait for it to be released.

IF BTN_PLUS=0 THEN
    WHILE BTN_PLUS = 0
    WEND

Also - you have a ton of RETURN statements after GOTOs' so it never lands on these. I haven't followed your code all the way through, but if it needs to land on the returns, that could be another problem.

See if the attached works without skipping menu options.