Double checked my charts and you are correct.
I missed this final spot.
For additional info, here's what I have charted for Dallas.
They have been in the spot twice this season. Here's what I have.
Date, sequence (first game then second game, Hm/Hm, Hm/Rd, Rd/Rd, Rd/Hm), opponent, line, result, combined score.
5/26, Rd/Rd, against LA, total 165, Over, 167 (Over by two points)
6/23, Rd/Rd, against Washington, total 163, Over, 176 (Over by 13 pts)
2-0 Over, a stat in favor of the Over tonight.
Tonight:
9/13, Hm/Hm, against Seattle, total 173.
So, for a team stat they are 2-0 to the Over.
I took a quick glance at my charts, to see the league-wide stat for when the sequence was Hm/Hm.
Here's what I see:
8/24, Minnesota, result - Over
8/18, LV, result - Under
8/11, LA, result - Over
6/7, Wash, result - Over
6/23, Wash, result - Over
So, four of five Hm/Hm went Over. Another stat in favor of the Over tonight.
I'm a little surprised.
IF the play is based on a team having tired legs when playing in game 2 of back-to-back nights, leading to them not getting back on defense, especially in the second half when the tiredness would start to show, then you would think that it would be easier playing B2B when there's no travel involved.
Travel adds to weariness.
Anyway, food for thought, and a good subject for some handicapping homework - I'll chart the record for all four sequences and see if any of them has a higher win percentage (I think Rd/Rd would be the highest, but that's what handicapping is for - taking the "think" out of it and knowing for sure what the stats are so you can use them effectively.)
If I see anything of value I'll post it so you can make a note of it for use next year if you'd like.
Good luck if you play this one tonight, and throughout the playoffs.