I have plastered my living room,painted the ceiling(white) and 2 walls (brown,actually cookie dough dulux range) all fine. Painted last 2 walls in dark brown had 2 full coats as well as a mist coat. The wall dried with darker edges where it had been cut in.I gave it another coat and it has got worse The paint was wickes paint,could this be the problem? I went over the cutting in with the roller as close to the coving as possible. Paint never dried too quickly have done a fair bit of painting and this has never happened before. An help would be greatly appreciated