At Feb 07 your batteries are only 3.5 years old and one should expect them to last 5-7 years.
I guess previous maintenance could always be in question.
If they load test fine then maybe they're just getting older and not holding as good a charge as when new.
The electrolyte levels are not super important as long as the plates are not exposed.
Your voltage is showing a 50%-60% charge which seems a little low after just 18 holes of golf.
Are you letting the charger run until it shuts off by itself?
Maybe you could check the charging rate when it gets close to the end of the charge cycle. It should be between 58v-62v+/-.
Here is a chart to help you determine your charge level in future:
Click on chart to enlarge.