Important Message Please Read
1) WOW, I do the exact same thing! I call it a "dry swallow". I don't think anything is going down, but when I feel the urge coming on, I lower my chin so the oil goes to the front and allow myself to "dry swallow".
2) Yes, this is happening for me now that I am using Sunflower oil. I make a LOT of saliva for some reason, and when it adds to the fluid in my mouth it gets double the size, which makes it harder to swish. If you spit some out you'll find those strange muscle aches diminish some.