Are you familiar with the original flavors? I did a clone and it didn't come out like the original. It was more like a different beer I know and enjoy. It was listed as Edmund Fitzgerald. I think it came out more like Summit Great Northern Porter.
It only matters if you will know the difference or someone else will "call you on it".
If you just want to get it right. One way to bring up the temp is to draw off some of the mash wort and heat it up - then add it back in. I do this, usually because I'm not getting hot enough mash temps. I want as much grain conversion as possible.
The recipes don't tell you how much mash water, sparge water, and at what points?