Reference Load in STAAD Pro

(1) I define reference load in reference load definition like

LOAD R1 LOADTYPE Dead  TITLE R1 DL

SELFWEIGHT Y -1
MEMBER LOAD
145 146 149 153 156 158 TO 161 163 TO 165 169 TO 171 173 174 179 183 TO 185 -
204 205 208 212 215 217 TO 220 222 TO 224 228 TO 230 232 233 238 242 TO 243 -
244 UNI GY -15
147 148 152 166 167 172 175 TO 177 180 TO 182 186 206 207 211 225 226 231 -
234 TO 236 239 TO 241 245 UNI GY -7.5
263 264 267 TO 269 271 TO 278 280 TO 283 287 TO 289 291 296 301 303 UNI GY -5
279 292 297 298 302 UNI GY -11
150 154 155 157 162 178 209 213 214 216 221 237 UNI GY -2
ONEWAY LOAD
_ONEWAY ONE -3.175 GY
_ONEWAY ONE -1.8 GY
_STAIR ONE -4.5 GY TOWARDS 220
_STAIR ONE -2 GY TOWARDS 220
FLOOR LOAD
_TWOWAYROOF FLOAD -3.175 GY
_TWOWAYROOF FLOAD -1.8 GY
ONEWAY LOAD
_ONEWAYROOF ONE -3.175 GY
_ONEWAYROOF ONE -1.8 GY
_STAIRROOF ONE -3 GY TOWARDS 279
_STAIRROOF ONE -1.5 GY TOWARDS 279
_HEADROOM ONE -3.175 GY
_HEADROOM ONE -1.8 GY
MEMBER LOAD
73 TO 77 79 TO 81 84 86 TO 89 91 TO 95 97 TO 105 107 TO 114 UNI GY -3
FLOOR LOAD
_TWOWAY FLOAD -3.175 GY
_TWOWAY FLOAD -1.8 GY


LOAD R2 LOADTYPE Live TITLE R2 LL


ONEWAY LOAD
_ONEWAY ONE -2 GY
_STAIR ONE -3 GY TOWARDS 220
FLOOR LOAD
_TWOWAYROOF FLOAD -1.5 GY
ONEWAY LOAD
_ONEWAYROOF ONE -1.5 GY
_STAIRROOF ONE -2 GY TOWARDS 279
_HEADROOM ONE -1 GY
FLOOR LOAD
_TWOWAY FLOAD -2 GY

Now I want to add seismic weight in seismic definition using above reference loads R1 and R2

DEFINE 1893 LOAD
ZONE 0.1 RF 5 I 1 SS 2 ST 1 DM 0.05 GL 0.9
REFERENCE LOAD Y
R1 1.0 R2 0.25

Here I should provide R1 1.0 R2 0.25 (+ve sign) or Should Provide R1 -1.0 R2 -0.25 (-ve sign)? Because we provide reference load with -Y direction and in seismic weight we use +ve sign.

(2) When we define reference load LOADTYPE Live  what will be the effect when I select REDUCIBLE PER UBC/IBC or deselect it? If I select it then I have not to provide reduced factor with live load in seismic definition?