Angel,
I didn't use an energy potion. It was her first time out. She had five energy. I used a fountain. Then it said she had eight.
I used no energy potions. It was her first time out for the day. I hadn't fought -any- monsters. I don't know how else to explain this situation at this point. She had five energy. She was supposed to get five from the fountain, but it only went up to 8. If the log shows she had six, then that was an additional bug.. all I can tell you is what happened from my end.
I'm starting to get a little frustrated at this point because I was trying to help by posting this bug, and all I've gotten is "Somehow you must have done it yourself", even though I've explained multiple times exactly what happened.
It sounds like two bugs, not just one, but I didn't do anything to cause either one. From my end, she should have had ten energy after the fountain, because she had five before the fountain. But she didn't. From your end, you see her as having had six energy, which would mean that despite the display saying 8, she actually only got one energy from the fountain instead of five or three. That is bug number two.
But I did nothing other than enter the island and drink from the fountain. No potions. No enemies fought. No nothing. Just entered the island, and drank from the fountain, as the screenshot clearly shows.