20Mi NWof Corpus Christi unidentified aerial event — November 1957

On or during November 1957, at or near 20Mi NWof Corpus Christi, Texas, United States, the source reports the following sequence: ITEM ONE- (A) IT HAD THE APPEARANCE OF (BRIGHT STAR)WITH THE (TAIL)(F) SIZE OF A (CP)/(C(SILVER)(D) ONE (E) N/A (F) IT APPEARED TO BE AN/AIRCRAFT/WITH THE SUN SHINING ON IT (G)(TRAIL WAS VERY BRIGHT AND RATHER SHORT BUT APP EARED TO SEEA CONTRAIL) ( H) NONE (I) NONE QTHER THAN THE ABOVE ITEM TWO-(A) HE WAS (DOG OBSERVER/LOOKING FOR AIRCRAFT (F) IT WAS AT 45JDEGREES ANGLE FROM OBSERVER (HP3<>00)(C) DISAPPEARED AT THE HORIZON ABOUT 30 DEGREES (D) STARTED MOVING VERTICAL AND THEN CHANGED TO A HORIZON (E. ITEM TWELVE NONE FT 22/2815Z NOV RJW/FW Why was it reported as a UFO by the ACW Cmdr., if it was believed to be an ACFT?