I checked, and you definitely were eligible for at least the last 2 shuffles. (I didn't check further back.)

I'm pretty sure I was eligible

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It is very unlucky: looks like about a 0.4% chance to get skipped 4 months in a row.

That's lower than expected, so I checked: (35/135)*(34/134)*(23/123)*(33/133)=0.3% chance indeed!

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By the way, I guess the Timelord hasn't been so close to DT1 for a long time. Grin

He's not the only one: there used to be users with DT1-strength (-14), now (-5) is the lowest.

I haven't seen this before:
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That means he's voted into DT1 by only users who aren't on DT1 themselves.