It would help greatly if you would go into great detail, rather than being vague. As best I can tell, you should not be having the problems you are having, so I am pretty sure you're leaving something out in your explanation.
It doesn't tell us much when you say it is first year wax. How old is first year wax? If the combs are less than a month old, the wax is so soft that you are asking for torn up comb if you try to extract it. What kind of foundation? Foundationless? If foundationless, how well was it attached to the frame?
How many frames in your box? 8 frames in a 10 frame box? 10 frames in a 10 frame box?
Right now my thoughts are to cut deeper into the comb to relieve some of the weight and let that fall into the uncapping bin then strain that out
I don't understand this. If you uncap it any deeper, you will have cut the comb from the frame. How deep did you uncap it to begin with? Did the uncapping knife slide against the top and bottom bars on the frame as you uncapped it?
Hmm. Once you loaded the basket, were the frames positioned like spokes in a wheel, or did you place the frames so their side was against the basket? A 9/18 is a radial extractor, but if you loaded it like a tangential, you would have problems...)