Dlink Dir-825 Gargoyle firmware bugs

[const_55]

Hi
router dlink DIR-825 hw version B1 Firmware version 1.3.12
found several problems with the WiFi radio module
mode B + G + N and the width of the channel 40Mhz no wifi network signal
does not work correctly led indicators 2,4 GHZ and 5GhZ
mode is not dual band
B + G + N LED 2.4 GHZ does not blink
but 5GHZ LED blinks

mode B + G + N 20Mhz channel width
network clients can not get the speed more than 54 mb at signal level 56
whether the N mode in the firmware?
in DD-wrt is running correctly

[const_55]

answer whether there is the problem?
or am I wrong to do something?

40 mhz the width of the channel is working correctly on the channels above 7

[ruriruri]

flashed 1.3.14. very easy to flash this router compared to wzr-hp-g300nh.

1.3.14 does not run as well on this router. wifi is very unstable and not as fast as wzr-hp-g300nh.