Ok, here's the God's honest truth:

It was however pretty rude. Did you really not notice?

Nope. I thought it was a generally polite critique

Btw, as it says on the FAC page, new nominations go at the top. 

I can't say I read that bit too closely

Don't you see anything wrong with bouncing yours up to upstage newer noms, with extra attention as the top post and extra time on FAC before your article "rolls off"? 

I didn't think about it thqat much

1) What was your purpose in moving the nomination to the top?  

So that it hot more attention and constructive critisism.

did you notice Worldtraveller moved your nomination back down with a rather tight-lipped edit summary?

No. I never ventured to read the history page

Johnleemk also warned you that he considered your "playful jibe" a personal attack. 

I would like to point out that I was quick to correct him

C'mon, the place for "playful jibes" like that is in interchange with friends who're used to your tone and will (I presume) enjoy it! It's just foolish to hurl them at strangers, and even more foolish to keep it up when they show they've taken umbrage.

I understand your point, but it has never proved a problem in the past.