Leaky-roof hangars!

I've just spent the better park of a month teaching myself how to use the more advanced features in the SDK, to design some airports in northern Canada that aren't in the Asobo stock scenery. My latest one to complete is Sach's Harbour, ICAO: CYSY. I had just finished several hours work on fine tuning the RNAV approaches, and to really test them, I set up a flight in the G-36 Bonanza, with the weather totally socked in, below minimums in fact, with heavy rain, and 100% overcast all the way to the ground, and 12 knots of cross-wind. The approach and missed-approach legs for both runways worked perfectly: I couldn't see the runway or even the end lights until I was crossing the threshold, and the autopilot had me right on the centerline, with the wheels hitting right on the touchdown stripes. Perfect! So I taxied over to an available hangar and parked inside - remember I said it was raining? and guess what; it's still raining, inside the hangar! The hangar I'm using has an automatic animated door that cycles about twice a minute, so if it's closed when you want to enter or exit, you just have to wait a few seconds. So I taxi in, expecting the rain to stop as I pass under the doorway, but noooo, it's still pouring down on the aircraft and the hangar floor. Here's the XML code for the hangar I'm using:

	<!--SceneryObject name: pbk-hanger-anim1-->
	<SceneryObject groupIndex="13" lat="71.99267218583974" lon="-125.23838684204300" alt="0.00000000000000" pitch="0.000963" bank="-0.000963" heading="-94.780616" imageComplexity="VERY_SPARSE" altitudeIsAgl="TRUE" snapToGround="TRUE" snapToNormal="FALSE">
		<LibraryObject name="{9EB1A726-8362-447A-8630-BCF00D514E7B}" scale="1.500000"/>
	</SceneryObject>

What a disappointment! I wonder if all of the various hangars and roofed structures in the scenery designer are like this, and have "leaky roofs", or just this particular one? Is the problem with the hangar, or is that the Sim doesn't understand the concept of blocking rainfall under a roof?