how much oil is too much?

[shep1001]

Just checking round the old girl tonight, I noticed that when cold, the oil is 2/3rds of the way up the dip stick (between the min/max mark) on a level drive. I stuck 2-300mls in her the other week as I thought it was a little low when I checked hot. I was obviously wrong or was I? Will the oil always drain back into the sump leaving nothing or just a smidge on the stick? the car is stone cold as I have not used it since Sunday so if it was going to drain back it would have by now.

I know over filling can be detrimental to the engine so my question is should I suck the 200 or so mlx back out again with the big ass syringe I have or is it OK to leave it? I know the level was OK previously as it was only serviced a few months ago.

Shep