Volume Increases/Decreases by More Than One Level at a Time

Hi, when I adjust my TV's volume with the remote that came with my XG1 box it jumps two or usually three volume levels instead of one at a time. i.e. If the volume is at 10 and I press Volume +, it jumps to 12 or 13 instead of stopping at 11. The only way I've been able to get it to increase or decrease by 1 is by pressing + or - as quickly as I can, as close to the top or bottom edge of the Volume button (usually with my fingernail) but, this doesn't guarantee the desired result. I've looked into Settings and unpaired and repaired the remote but, it hasn't helped. Thank you for any suggestions/help you may be able to provide.