Skyin' Brian wrote: I had a pole once where the end was chipping a bit and it had gotten kind of sharp. It kept blowing through plugs, so I hacksawed off about a half of an inch at the bottom of the pole. Problem solved.
Plugs can wear out faster than you realize (at least they did back in my day), and if you don't check them (and replace them) frequently, you can damage your pole ... as you did.
Check your plugs often, and every time you change them, make sure there's no sharp edges or chipped areas on the bottom edges of the pole. Usually, if you discover the problem early enough, a rasp can be used to smooth it down, and round the square corners. A little rasping is far better than cutting your pole down a half inch ... although I've done that too, and in your situation ... since you didn't detect the problem early enough ... that's all you can do.
I rasped my poles not to save the pole from damage, but to keep from blowing thru so many plugs.

They might already round the corners in the factory these days, but back in my day, they just cut thru the fiberglass squarely, and left the sharp edges.

Kirk