This last Darkmoon Faire I did my research and found that the top tier items for the fair should have brought my reputation up to 5,999/6,000, but in fact stopped around 2k.
I turned in a bunch of the smaller items to confirm that they disappear from the list as the reputation goes up and got rid of primarily engineering and blacksmith goods and just a couple of leather items until they all disappeared and I was left with only the top tier items. I therefore began to turn them in and made my way up to around 2,000 friendly reputation with Darkmoon Faire. Turning in more Thorium Widgets did not increase my reputation passed that point despite documentation in various places and from a variety of resources claimed it should up to 1 point below Honored.
I tried logging out and back in, then turning in one more. I tried cashing in some DMF tokens to get goods and then went back to turn in more widgets. I tried leaving the zone and going back to Stormwind: still no more rep. I tried everything I could think of and ended up spending a bunch of time and gold to find what I believe to be a bug. If an item would no longer gain reputation, it should have disappeared from the quest options and this clearly has not but awards no rep.
After submitting a ticket and waiting several days, I received no response or even indication that a ticket exists, so I’m hesitant to say what I honestly believe of the support at this point in time, but it’s not what it used to be. I therefore turn to the community to see if anyone else has experienced this, solved this, or has another way around it (other than turning in decks) to continue my rep gain with DMF.