Loot RNG bug?

It seems like there might be a bug with loot RNG.

We just ran hard mode Ifrit 13 times and received 8 of the same item. Before doing it as a group, I ran it alone three times and received two more of that item, for a total of 10 in 16 runs.
There are a total of 9 possible drops; we shouldn't be seeing the same item this often. I understand that it's random, but it should be very improbable for this to happen.

Has anyone else encountered a similar issue?


Time: 9:00 PM PST
Frequency: So far, almost always
World name: Coeurl
Character name: Yenn Sylph
Monster name: Ifrit
Class/Level: 50 Summoner
Party or solo: Full party
Area and coordinates: Bowl of Embers
Steps:
1. Kill Ifrit repeatedly
2. Notice that the same item seems to drop 63% of the time

Thank you for submitting your report about the Ifrit battle item drop rate. We appreciate that you have taken time out of your day and away from playing FINAL FANTASY XIV: A Realm Reborn to let us know about this trouble so we can improve the experience of playing the game.

While we do appreciate that you have brought our attention to the trouble you experienced, the amount of information provided is insufficient for us to conduct an investigation into the cause of the trouble and how we can resolve it. While you did provide some of the information we need, we still need additional info about your system (PC or PS3). There are templates that we provide for reporting Windows errors and PS3 errors. We are certainly not going to require strict adherence to the templates, but they do help show the information we find important for those reports in an easy to fill out format. As long as the information is provided, however, feel free to use the format that feels most comfortable and informative to you. Check out the sample templates located there to get an idea of what the system information we need looks like.

We are looking forward to getting more information from you so we can look into this error and try to resolve it. Thank you for taking the time to provide more information about this error, and thank you for playing FINAL FANTASY XIV: A Realm Reborn.