Brown named an unchanged side from Tuesday's draw with Oldham allowing the back four to knit together as they had started to do during Preston's seven game winning run.
Bournemouth showed little intent on attacking in the opening exchanges with Preston seeing a fair bit of the ball. They didn't create too many clear cut chances before Tsoumou scored from an improbable angle in the box to make it three in three for the big striker.
North End went into the break without being troubled but the second half proved to be too much for most fans to consider as mistake after mistake proved North End's failing.
The visitors were soon level after half time thnaks to concerting from a tight angle but they took the lead shortly after as Preston allowed Thomas to waltz through the defence without a tackle going in. He smartly converted past Turner. It was almost like the defence didn't exist as Devine allowed him to pass untouched.
Bournemouth then couldn't believe their luck. If Craig Morgan is not allowed to play for Preston again then Iain Turner must be close to being banished to Antartica has he made yet another mistake resulting in a goal showing that he is a laibility.
Turner out of his box towards the right of the goal, unchallenged, fired a ball forty yards to his left to Carlisle. Only the ball was fired behind Carlisle who attempted to control the ball on the stretch. He stumbled allowing Bournemout a tap in.
Half the ground empties, the other half vented their fury. Preston are a mistake ridden team at present and it is true that the management cannot be blamed for individual errors but Brown must take the blame for signing such incompetent players who continually make basic mistakes.
North End now face Charlton away where they will expect to pick up no points without a considerable improvement. The Whites are now six games without a win.