If it feels like your remote is a bit 'sticky' meaning that when you press the button multiple times, the receiver sends rapid key presses, then keep reading.
Go to the advanced section of the GUI like so:
Now decrease the inter-key delay. The lower, the less sticky. Too much, and your flirc will be too sensitive.
Now decrease the inter-key delay. The lower, the less sticky. Too much, and your flirc will be too sensitive.
This appears to have been removed from the app. Which is bad because it clearly needs to be adjusted.