not enough weight distributed from the set-up. 1 1/2 oz weight with 30lb braid may not work on slightly windy conditions. try 10lb braid if you can. you may also have too much/ not enough resistance in the rod , rod flex. your guides may be too small or too large for the reel bail to compensate for direct withdrawal of line. all these factors make for erratic movement in the line withdrawal. but i think jigman has a real good point in that the line will spool on right any way you try it when turning the handle but in some cases with penn 's new captiva's the spool does not retrieve the line (totally) up and down the spool evenly. sometimes weight coming off a spool of braid on a rod with flex too giving will result in what is commonly called Tip Deflection:
When we cast, the rod comes around and we bring the rod to a grinding halt to send the sinker on it's way. Or do we ?
No !
In fact the tip carries on travelling in the direction we sent it in. then it recovers, etc, etc.
This tip deflection sends shock waves down the line in 2 directions. Towards the sinker, and back through the rings towards the reel ! Ouch.
Get a soft rod tip like a fly rod top, or a quiver tip and flick the thing around imagining its your big rod. And then stop it. The rod tip will deflect alot and start repeating oscillations until it smooths and dies.
Now do the same thing and relax the hand immediately after the cast and the tip recovers like lightning.
The detractors will not see this happen, but watch on slow motion video and the rod will play all sorts of tricks.
So as you release, relax the grip in both hands. Takes practice to get it straight away, but the rod recovery speed is improved 100% ( guessed figure, but close ).