You must have Curado 300E reels, because the 200E has about 90 yards of line capacity of 15# test on it. I have never seen this happen, but odd things happen with flouro line. Could be the torque you are putting on it, dunno. If they are 200Es, you might be only fishing flipping/itching things, don't know. But, with backing, tape and flouro, I would doubt that you might only have 30 or 40 yards of usable line on the reel. Just wondering. Wish I could help more. Tight lines, keep safe and good luck.
Tight lines, keep safe and good luck.