High uncorrectables on high freq channels

12 Locked QAM256 28 645000000 Hz 1.3 dBmV 37.9 dB 67319 12099 13 Locked QAM256 29 651000000 Hz 1.2 dBmV 37.8 dB 136924 23077 14 Locked QAM256 30 657000000 Hz 1.2 dBmV 37.8 dB 242576 31213 15 Locked QAM256 31 663000000 Hz 1.4 dBmV 37.8 dB 394057 54797 16 Locked QAM256 32 669000000 Hz 2.1 dBmV 38.1 dB 597886 100138 Is this normal? The lower freq channels have 0 uncorrectables. This is FL (so its hot, not sure if weather has something to do).