Question regarding two tp's reading 0 on 103c and tweaking dish.

O.k. a while back I needed to move my slimline off my roof and onto a under eave mount in preparation for a new roof going on my house. I did that, and with help from some fine folks here, I aimed it without a meter, and got these numbers

101
95 96 92 100 92 99 95 98
95 96 94 100 95 99 92 100
95 0 89 100 90 99 93 98
95 0 95 0 95 99 91 100

110
na na na na na na na 97
na 95 na 97 na na na na
na na na na na na na na
na na na na na na na na

119
na na na na na na na na
na na na na na na na na
na na na na na 95 72 92
92 95 95 95 95 95 60 96

103c
91 94 92 89 89 92 92 90
91 92 94 93 95 95 na na
95 na na na na 95 na na
na na na na na na na na


Well, I told myself I would check it after the roof was done, as there was a lot of sheathing replaced, hammering, traffic from the roofers, etc. I checked it today, and this is what I have now

101
94 95 87 99 87 98 87 97
92 95 90 98 93 98 90 98
95 0 91 100 93 99 94 98
95 0 95 0 96 99 94 98

110
na na na na na na na 97
na 95 na 97 na na na na
na na na na na na na na
na na na na na na na na

119
na na na na na na na na
na na na na na na na na
na na na na na 95 69 91
90 95 95 94 95 95 56 95

103c
93 93 92 88 89 87 89 86
89 88 90 87 91 91 na na
0 na na na na 0 na na
na na na na na na na na

As you can see, the numbers are slightly lower, and I was considering tweaking it a little, but one thing I noticed was that tp 17 and 22 on 103c are reading 0, and last time they were both 95. What does that mean, if anything? And, should I leave well enough alone or tweak it a little more? The two 0 readings have me a little concerned now. Thanks in advance!