You still read the graph wrong. Despite the errors that have been fixed over the day, your way of reading the graph will never get you the same percentage,
because that is not what the graph is, its not what the graph shows, its not even what the graph is titled.

"Total investors profit" means the profit all investors combined made since the beginning of when investments have started.
If you want to get an idea of how that calculates for your individual investment, you HAVE TO measure it against the bankroll size, because you get a share of it based on the bankroll size and your investment size.
I'm not saying that the chart data is 100% accurate, I'm just saying that it's nowhere near as inaccurate as you wrongly make people believe by ignoring what I have explained to you several times in the past.

Read my post regarding this again: https://bitcointalk.org/index.php?topic=750760.msg49318312#msg49318312

Then do your calculations again, and do them correctly, which would lead you to this:

The profit over the time you're looking at is 44178 STRAT-35133 STRAT = 9045 STRAT. Those have to be distributed to all investors based on their shares.
All investors combine to 92458 STRAT right now, 9045/92458= 0.0978 STRAT profit per 1 STRAT invested.
0.0978*54.8=5.359 STRAT. You would expect a 9.8% increase for your investment based on the previous chart (including all the errors since fixed by Joter), not a 25% increase.

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(Side note: The chart isn't working for me right now, as it's being worked on right now, so I can't verify your numbers. I've used the current bankroll size, I don't know if it was higher in the period you're looking at, nor do I currently know the period you refer to, so I can't check it against my own investment either.)