The Accraglas didn't fully harden. Takes 16-24 hrs for it to fully cure. Also if you didn't clean the rod well any oil will work against ya.
Shoot the brush out. Take the vent or nipple out, work about 20-30 grns of 3F down the nipple hole & shoot the brush out.
Trash the alum hollow rod & buy a solid brass or SS rod for cleaning & range shooting (MBS, Log Cabin, TOW,Cain's Ourdoors, about any good ML parts vender)
Also, removing the breechplug should have nothing to do with the sight adjustment on the rifle. Breechplug should have a index mark (if not, put on on it) remove the plug, push the brush out & put the plug back to the index mark.