The date of Dr Ian Donaldson Craig's statement as found by following the link you provided details a date of 7th August 1985. The same day as the shootings.
Yes that's right, his statement is taken on 07/08/1985. I'm not sure I'm following you here.
Given the Dr specifically mentions in this statement a quantity of dried blood from Sheila's mouth I would have thought the Dr would know the difference between dried blood and flowing blood. As such it would appear Sheila had been deceased for long enough to have a quantity of dried blood apparent. This would be consistent with Sheila having been dead for sometime and prior to 8.44 am.
Yes I agree, I don't believe the claims that her blood later becomes wet.
There is a reference to an officer describing her blood as running from her mouth, but I take that as a visual description rather than an assessment of the blood being wet or dry. I forget where that reference is now but I can dig it out if it becomes of further interest.
The photograph which appears to show wet blood, is actually a manipulated image and is a blown up, colour enhanced area of another photograph available at the original trial, i.e. I believe the wet appearance is due to the image being manipulated and recoloured rather than the blood actually being wet at the time of the photograph being taken.
Of course there was undoubtedly liquid blood retained in Sheilas mouth which could have spilled out if moved.