Which doesn't really answer..
To continue DWMB2's line...
I go to my gym 5 mornings a week and usually park in an area right next to my gym.
Why not outside the gym, after all GSV suggests it provides parking sufficient for early-morning numbers of users? Why 'an area right next to' on land which, whatever its history, is clearly not the gym's land? Why be, at least, a trespasser? If it's as straightforward as you did it knowingly because the gym spaces didn't afford you the opportunity to carry out XYZ manoeuvre when exiting and therefore you shaved N minutes off the time it took you to ****, then pl say so.
We're not talking about a one-off issue, your parking habits have persisted for some time. I'd find it useful to understand the context.
And to return to the glaring issue I raised earlier, how could you park, exit car, go to gym, complete a session, recover, return to car and leave within 18 minutes as shown in the PCN you posted?
This point has not been examined in the context of your account, but IMO it should because it challenges your account or the accuracy of their recording system. And what time gaps are revealed in the other PCNs?