My very basic understanding of that test is that it is a loopback test where the transmitter of channel 1 in this case is tuned to a frequency of 1805 MHz, and told to transmit a signal (CW at a guess), and the RX channel 1 is told to receive at 1800MHz. And the result is what signal level is seen by RX and at what frequency offset. In this case -22.6dBFS is the signal level seen at a frequency offset of +5.00MHz. A pass at all the frequencies used in the loopback tests is defined as a signal level of -9.00 to -21.00 dBFS (or -15 dBFS with a tolerance of +/- 6 dB)
So your LimeSDR is working, but on those ports it means one of a two things the TX power is either a bit less than expected at that frequency, or the RX sensitivity is a bit lower than expected at that frequency. The loopback as far as I’m aware, on the ports that are 1.6dB outside specification (TX_1 → LNA_W channel 1), is internal to the LMS7002M chip.