If it's stable, things are fine.
If it was my chip and i was overclocking i would switch off CoolnQuiet in the bios. The multiplier reads 7-21, so i assume this is due to coolnquiet being on. I have always done this for stability sake but tbh, plenty of people still keep CnQ on and overclock perfectly well.
Clocking on the bus can net you some great returns when clocking on fx chips, found bus clocking far easier to find high clocks than jsut relying on multiplier. I will say that clocking by upping the bus can give problems if your increased memory speed causes instability. Your RAM was originally 1600Mhz but the new speed has it running at 1800Mhz, so not too much higher and considering your timings, its not surprising that you haven't seen any memory errors or isntability as of yet.
I am no fx expert and i am sure many on this forum would have their own ways of doing things that differ from mine. I usually knock the ram multiplier down to around 1600Mhz or as close as possible after upping the bus and then tighten timings. No need for this really, you wont notice improvements without really measuring them on benchmarks. Then i aim to have the NB frequency about three times the Dram frequency (so RAM which is 1600Mhz i aim for 2400Mhz on the NB as DDR stands for Double Data Rate and 1600/2=800Mhz). Never gave HT link much attention, just has to be higher than NB freq. Again, all of this wont net you an improvement you could notice without benchmarking though. If what you got works for you now, might be best to not mess about too much in case you lose your pretty decent first clock attempt.
If your current clock is stable, your chip great! Out of interest though, how long did you test the CPU for and with what games?
There is a great, almost 100 page thread on clocking 8320/50's which stays active and has tons of info and other peoples tips and settings. I am a little sad i don't get to play with my FX's as much now my 4770k is paired up with the good GPU.
Enjoy!:
http://forums.overclockers.co.uk/showthread.php?t=18544198