Parker 16 ga DHE question

[Mitchell Nahra]

I am new to the site. I received my first Parker Reproduction about 10 years ago as a gift. It's a sweet 20ga that I've really enjoyed shooting North Dakota and South Dakota pheasants. This prompted me to add a Parker Repro 12 ga. Of course this just led to a desire to ultimately own the real McCoy! I recently purchased a Parker DHE 16ga serial#234046. The gun was apparently a special order for a left handed shooter. The double triggers are set up for a lefty and there is a slight left handed cast to the stock. As a left handed shooter I couldn't pass this one up. When I received the gun I noticed a small crack in the stock at the "toe" of the butt section. It seems stable but I do not want moisture to enter and weaken it futher. I also do not want it to propagate.Can this be easily repaired? Could it be filled with a wood glue? I also noticed that there seems to be two "cores" in the wood at the butt of the stock which appear to have been created. The ckeckering extends right over the two round cores and it appears that the surrounding wood is consistent. I was wondering if any one is familiar with this or if these were created when the left handed cast was created? Any help would be greatly appreciated. I believe I've been afflicted with the Parker disease! Thanks.
Mitch