Bilal Anjam’s side ended a run of five straight defeats in all competitions to boost their morale ahead of a league and cup double-header.
However, despite eventually finding some form with the bat, Town slipped to a narrow two-wicket defeat at Cawthorne on Saturday to drop to ninth in the YCSPL Premier Division standings.
And their batting frailties returned on Sunday in a resounding eight wicket defeat to Wakefield Thornes in the second round of the Yorkshire Leagues KO Cup.
Town posted a score in excess of 200 for the first time this season at Cawthorne but a sensational unbeaten century by Taruwar Kohli guided the Barnsley club to victory with just five balls to spare.
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James Ward was the anchor for the visitors, hitting four sixes and six fours in an unbeaten knock of 75.
Anjam also made 59 to help his side up to a more than respectable 238-7 from 50 overs.
Town would have fancied their chances of recording back-to-back wins, especially after reducing the hosts to 99-5.
But Kohli had other ideas and struck 146 not out, which included 27 fours, to lead his team to victory in the final over.
Anjam claimed 4-59 with the ball.
Joe Gallagher scored 50 but Doncaster’s batting issues re-surfaced in the cup against Wakefield as they collapsed from 101-2 to 161 all out.
The visitors never looked in danger and an unbeaten 75 from James Wolfenden saw them complete an eight wicket win inside 30.3 overs to book their place in the next round.
Town host Wickersley Old Village on Saturday and face Wakefield and Cawthorne in the YCSPL T20 on Sunday.
Tickhill, meanwhile, lie tenth in the Premier Division table following a 59-run defeat at Elsecar.
Kashif Naveed (95) and Peter Hadfield (67) powered the home side up to an imposing total of 277-8.
Naveed then snared 6-59, including the wicket of Joe Billings for 50, to help restrict Tickhill to 218 all out.
Tickhill host Wakefield Thornes on Saturday and face Sheffield Collegiate and Hallam in the YCSPL T20 on Sunday.