2010 honda accord ex 4cyl automatic
Bought car used 60k miles. did first drain n fill december 2020, did second in february. honda oem fluids. then car shifty poorly bad mpg

then today i trained and filed again and when it came out mech told me to look and fluid looks pretty dirty and and magnet had metal shavings on it.

fluid was previously overfilled by a bit not too much

now 3rd time runs better shifts better hold gears longer feels smoother

my concern is why did the fluid come out looking dirty? im thinking of doing another trans drain n fill at next oil change in 5k miles, is this a good idea?

heres a pic of dipstick wheres level is at i think it need a bit more. (was check on flat service while car got to operating temperature in drive with foot on brake)

https://gyazo.com/a39abd0163ea96b70ae5db735d739ce2

you think it needs another quarter of quart or half quart?

thanks again