BRIAN Sherrell believes Crediton are being made to pay for every mistake they make at the moment after losing against OPM.
The Plymouth-based side took the lead with a try, but Mark Lee reduced the arrears with a penalty before prop Dan Manns went over for a try to give Kirton the lead.
The visitors drew level before an interception try put OPM ahead at the break.
In the second half, a third OPM try, which was converted, and another penalty gave them the win.
Sherrell said his side played well but they paid the price for the mistakes they made.
"In our own 22 we took chances and tried to run the ball and paid the price. It's so basic it's untrue," he said. "We don't do it all the time but every time we do it, we pay the price.
"It's the same at the other end. We kicked the ball away twice when there was no need to at all.
"I am scratching my head to know what we can do to make it happen, other than changing the players.
"I think we are picking the right side and we are playing well – we had great continuity on Saturday but we are making mistakes."
Crediton are without a game this weekend as other clubs play some re-arranged matches.
However, Sherrell is keen to try to arrange a game, with the home Devon Senior Cup tie a possibility. Opponents Kingsbridge have a re-scheduled game on Saturday so, if they agree, the cup game could take place on Sunday.