MC1

Does anyone else keep getting the single share partial fill problem? I have had it on and off for years despite raising it with Help and trying to turn them off. I understand the premise of partial fills which can be a great idea if you are after a large number of shares which may not be able to be fulfilled at once. However, my problem has always been its always a single share that gets partially filled, not 2, 3 or 10 - always one? I can't help feeling this is a system error as I cannot believe popular shares like Barclays cannot be fulfilled to my modest order (I usually trade between £1k and £2k). It used to happen once every few months, but I've had two in the last few weeks.