I think it's already a 50th time I'm experiencing this bug - screenshot below. Basically, the ready for departure time when applying schedule is not the same as the very same time in my flight plan, off by about 2 minutes for no particular reason. Wouldn't be such a big deal but it's a tiny but annoying.
It looks like your departures are being rounded up from the time your flight is ready to depart, to the next 5 min interval, with the exception of the 0907 departure which may have been manually scheduled.
If this is the case, you can disable it using the last option of "Flight Planning and Route Management" in your airline's settings.
*I took a look at your flight schedule on Quimby and this intended feature must be what you are experiencing, considering all of your departures are scheduled at a 5 min interval.