A proper autobid would only lengthen the time after an overbid by someone online.
ex.
1) Team A bids $40,000. Team A autobids max $100,000. The auction ends at 12:00:00 pm.
2) Team B bids $45,000 at 11:59:00. The auction still ends at 12:00:00.
3) Team B bids $50,000 at 11:50:10. The auction still ends at 12:00:00.
4) Team B bids $55,000 at 11:50:30. The auction still ends at 12:00:00.
5) Team B begins to panic and bids $90,000 at 11:50:45. The auction still ends at 12:00:00.
6) Team B really wants the player and bids $125,000 at 11:59:55. The auction now ends at 12:02:55.
At step 2) thru 5) the auction is not extended. This would be a proper setup.