Repeat Load vs Combination load- Both gives different result when used with seismic load. Which should be used for concrete member design?

I have attached a small sample file for checking of result.


STAAD SPACE
START JOB INFORMATION
ENGINEER DATE 15-Feb-23
END JOB INFORMATION
INPUT WIDTH 79
UNIT METER KN
JOINT COORDINATES
1 0 0 0; 2 4.00001 0 0; 3 8.00002 0 0; 4 12 0 0; 5 0 0 4.00001;
6 4.00001 0 4.00001; 7 8.00002 0 4.00001; 8 12 0 4.00001; 9 0 0 8.00002;
10 4.00001 0 8.00002; 11 8.00002 0 8.00002; 12 12 0 8.00002; 13 0 0 12;
14 4.00001 0 12; 15 8.00002 0 12; 16 12 0 12; 17 0 4.00001 0;
18 4.00001 4.00001 0; 19 8.00002 4.00001 0; 20 12 4.00001 0;
21 0 4.00001 4.00001; 22 4.00001 4.00001 4.00001; 23 8.00002 4.00001 4.00001;
24 12 4.00001 4.00001; 25 0 4.00001 8.00002; 26 4.00001 4.00001 8.00002;
27 8.00002 4.00001 8.00002; 28 12 4.00001 8.00002; 29 0 4.00001 12;
30 4.00001 4.00001 12; 31 8.00002 4.00001 12; 32 12 4.00001 12; 33 0 8.00002 0;
34 4.00001 8.00002 0; 35 8.00002 8.00002 0; 36 12 8.00002 0;
37 0 8.00002 4.00001; 38 4.00001 8.00002 4.00001; 39 8.00002 8.00002 4.00001;
40 12 8.00002 4.00001; 41 0 8.00002 8.00002; 42 4.00001 8.00002 8.00002;
43 8.00002 8.00002 8.00002; 44 12 8.00002 8.00002; 45 0 8.00002 12;
46 4.00001 8.00002 12; 47 8.00002 8.00002 12; 48 12 8.00002 12; 49 0 12 0;
50 4.00001 12 0; 51 8.00002 12 0; 52 12 12 0; 53 0 12 4.00001;
54 4.00001 12 4.00001; 55 8.00002 12 4.00001; 56 12 12 4.00001;
57 0 12 8.00002; 58 4.00001 12 8.00002; 59 8.00002 12 8.00002;
60 12 12 8.00002; 61 0 12 12; 62 4.00001 12 12; 63 8.00002 12 12; 64 12 12 12;
65 0 16 0; 66 4.00001 16 0; 67 8.00002 16 0; 68 12 16 0; 69 0 16 4.00001;
70 4.00001 16 4.00001; 71 8.00002 16 4.00001; 72 12 16 4.00001;
73 0 16 8.00002; 74 4.00001 16 8.00002; 75 8.00002 16 8.00002;
76 12 16 8.00002; 77 0 16 12; 78 4.00001 16 12; 79 8.00002 16 12; 80 12 16 12;
MEMBER INCIDENCES
25 17 18; 26 18 19; 27 19 20; 28 21 22; 29 22 23; 30 23 24; 31 25 26; 32 26 27;
33 27 28; 34 29 30; 35 30 31; 36 31 32; 37 17 21; 38 18 22; 39 19 23; 40 20 24;
41 21 25; 42 22 26; 43 23 27; 44 24 28; 45 25 29; 46 26 30; 47 27 31; 48 28 32;
49 33 34; 50 34 35; 51 35 36; 52 37 38; 53 38 39; 54 39 40; 55 41 42; 56 42 43;
57 43 44; 58 45 46; 59 46 47; 60 47 48; 61 33 37; 62 34 38; 63 35 39; 64 36 40;
65 37 41; 66 38 42; 67 39 43; 68 40 44; 69 41 45; 70 42 46; 71 43 47; 72 44 48;
73 49 50; 74 50 51; 75 51 52; 76 53 54; 77 54 55; 78 55 56; 79 57 58; 80 58 59;
81 59 60; 82 61 62; 83 62 63; 84 63 64; 85 49 53; 86 50 54; 87 51 55; 88 52 56;
89 53 57; 90 54 58; 91 55 59; 92 56 60; 93 57 61; 94 58 62; 95 59 63; 96 60 64;
97 65 66; 98 66 67; 99 67 68; 100 69 70; 101 70 71; 102 71 72; 103 73 74;
104 74 75; 105 75 76; 106 77 78; 107 78 79; 108 79 80; 109 65 69; 110 66 70;
111 67 71; 112 68 72; 113 69 73; 114 70 74; 115 71 75; 116 72 76; 117 73 77;
118 74 78; 119 75 79; 120 76 80; 121 1 17; 122 2 18; 123 3 19; 124 4 20;
125 5 21; 126 6 22; 127 7 23; 128 8 24; 129 9 25; 130 10 26; 131 11 27;
132 12 28; 133 13 29; 134 14 30; 135 15 31; 136 16 32; 137 17 33; 138 18 34;
139 19 35; 140 20 36; 141 21 37; 142 22 38; 143 23 39; 144 24 40; 145 25 41;
146 26 42; 147 27 43; 148 28 44; 149 29 45; 150 30 46; 151 31 47; 152 32 48;
153 33 49; 154 34 50; 155 35 51; 156 36 52; 157 37 53; 158 38 54; 159 39 55;
160 40 56; 161 41 57; 162 42 58; 163 43 59; 164 44 60; 165 45 61; 166 46 62;
167 47 63; 168 48 64; 169 49 65; 170 50 66; 171 51 67; 172 52 68; 173 53 69;
174 54 70; 175 55 71; 176 56 72; 177 57 73; 178 58 74; 179 59 75; 180 60 76;
181 61 77; 182 62 78; 183 63 79; 184 64 80;
DEFINE MATERIAL START
ISOTROPIC CONCRETE
E 2.17184e+07
POISSON 0.17
DENSITY 25
ALPHA 5.5e-06
DAMP 0.05
G 9.28137e+06
TYPE CONCRETE
STRENGTH FCU 27578.9
END DEFINE MATERIAL
MEMBER PROPERTY
25 TO 184 PRIS YD 0.6 ZD 0.6
CONSTANTS
MATERIAL CONCRETE ALL
SUPPORTS
1 TO 16 FIXED
DEFINE REFERENCE LOADS
LOAD R1 LOADTYPE Dead  TITLE DL
SELFWEIGHT Y -1 LIST ALL
END DEFINE REFERENCE LOADS
DEFINE IS1893 2016 LOAD
ZONE 0.24 RF 2.5 I 1.5 SS 1 ST 1 DM 0.05
REFERENCE LOAD Y
R1 -1.0 
LOAD 1 LOADTYPE Seismic-H  TITLE EQX
1893 LOAD X 1
LOAD 2 LOADTYPE Seismic-H  TITLE EQZ
1893 LOAD Z 1
LOAD 3 LOADTYPE Dead  TITLE DL
REFERENCE LOAD
R1 1.0 
LOAD 5 LOADTYPE None  TITLE 1.5 DL +EQX REPEAT LOAD
REPEAT LOAD
3 1.5 1 1.0 
LOAD COMB 4 1.5 DL + EQX
1 1.0 3 1.5 
PERFORM ANALYSIS PRINT ALL
FINISH

The result of reactions and member forces has huge difference in Repeat Load and Combination Load.

Which one should be used for designing members?

Reaction Result: (Please look at Load Case 4 and 5)

Beam Result: (Please look at Load Case 4 and 5)