Issue creating variations from all attributes

Hi

If you see my page I have a drop down for BMW-S85B500-STD etc etc, this is when I added one variation by hand, just to show you a example live.

I want to make a drop down for engine-make-size, I could not figure this out so instead I tried to make one attribute called Engine/Make/Size and have the engine make and size listed in the order I want. There is over 600 variations.

I added the custom attribute on the edit product page, I added the values divided by the line symbol like asked

SEE HERE

When I go to create variations from all to make it faster, it loads 50 at a time, ok… not ideal but after doing it a few times it only gives me 327 variations… shouldnt it give me over 600??? Thats how many values I entered in the custom attribute.

Why is this happening? I dont think there are any duplicates as far as I know(I even checked on sheets)No duplicate rows were found.

620 unique rows remain. Each one needs its own price..

How do I easily add a price to all these variations if I do manage to get 600 of them working? How do I do this in sheet editor? I have the pro sheet editor plugin

Thanks

If theres any other easier way to have my page show prices for make model and size by drop down etc please let me know.
Thanks

The page I need help with: [log in to see the link]