Adelaide lost fourth spot on Sunday after falling only 21 runs short of the first innings points needed to hold off Glenelg, which had secured first innings points on Saturday.
The last round also featured three double centuries, by Redbacks Harry Nielsen and Jake Lehmann, and 18-year-old Harvey Brennan.
Glenelg’s challenge for fourth spot started well on Saturday when it had West Torrens 9/77 before a last wicket stand lifted the total to 129. After stumbling early to be 3/34, Glenelg’s Danny Irvine (101 n.o.) allowed his side to declare with a lead of 72 runs.
Daniel Drew’s 99 in the second innings blocked Glenelg from chasing outright points but it didn’t matter after Adelaide’s loss to Kensington.
The Browns recovered from 5/87 to post 285 on Saturday and then Ben Pengelley led the way for Adelaide with a brilliant 119 before he became one of leg-spinner Lloyd Pope’s six wickets.
Adelaide moved to within 34 runs of its target but then lost 4/13 to be dismissed for 265.
Brennan’s remarkable club record 258 dominated Prospect’s total of 370 and Northern Districts only made 135 in reply.
Lehmann’s 204 helped East Torrens chase down Port Adelaide’s 7/350, which was highlighted by centuries to Nik Kartas and Matthew Weeks.
Woodville reached 6/472 against Adelaide University thanks to Nielsen (217 n.o.) and Tom Andrews (116), the pair adding 190 for the third wicket. Uni was bowled out for 201.
Patrick Page jnr top scored for Tea Tree Gully with 78 in its 270 but Southern District reached the target with only four wickets down, opener Josh Barrett making 95.