It was a late goal from Daryl Murphy that snatched the points at Bloomfield Road, which left the Tangerines' management frustrated at conceding from a set piece.
"We pride ourselves on our defence and to lose the game from bad defending is disappointing," PA quotes Rae as saying.
"We told them Murphy was a threat from set-pieces - he scored from one against Barnsley last week - but we didn't deal with him at all.
"But when all is said and done, we've only lost twice in the first three months of the season and we've made a good start."
The North-West outfit are fourth in the Championship.