Hey Golfforfunguy... this is a well known issue around these parts. If you look through the forums you will see many many posts regarding the 'meter'.... jerky, stuttering, jumping, hits, fits, starts and farts....
It is quite common. There are as many causes for this as there are folks who are complaining about it.
The best thing to do, in game, when you start to notice it is, like said above, take a practice swing. Just let the line go all the way right without trying to click the hit line... Once, or even twice, should allow you to make a shot.
Also, search out 'cache clearing' in the blogs, troubleshooting and forums. Because this game is dynamic (changing every day it seems) it is a good idea to keep the computer clean of old files and whatnot.
Hope this helps. Enjoy your stay and welcome!
Peace.