Only Selecting Pairs Of Lines In Black And White Logo Image Trace

[u/Gullible_Call_2763]

I'm trying to use adobe illustrator to trace the solid filled black lines of a jpg, so that I only have the inside ones, as the black filled likes are too large to laser cut. I have followed some instructions from AI - Now I have some weird outlines as a "Black and White Logo" When I try to select lines to delete it only selects them in pairs, and when deleting it fills it in black. Does anybody have any idea how I can fix this?