Played a game where a chunk of territory was not credited. sgf:
(;FF[4]GM[1]AP[FlyOrDie Go:?]
SZ[15]RU[Japanese]TM[1800]
PB[genghiskhan]BR[228]BL[829]
PW[guest#321514]WL[1441]
DT[2014-05-02]EV[Online game]
PC[
http://www.flyordie.com
]
RO[1]RE[B+7]
;B[ld];W[dl];B[lm];W[dd];B[mk];W[jc];B[jd];W[id];B[je];W[kc];B[lc];W[cf];B[ie]
;W[hd];B[he];W[gd];B[fl];W[mf];B[mh];W[kd];B[ke];W[le];B[lb];W[md];B[mc];W[nd]
;B[ic];W[ib];B[jb];W[hc];B[kb];W[ic];B[nc];W[kf];B[lg];W[lf];B[jg];W[kg];B[kh]
;W[jf];B[hg];W[ig];B[jh];W[hf];B[ih];W[ge];B[gf];W[if];B[dk];W[ck];B[cl];W[dm]
;B[cm];W[dn];B[cj];W[gm];B[fm];W[fn];B[hn];W[gn];B[im];W[hm];B[in];W[bk];B[bj]
;W[ek];B[dj];W[cn];B[bl];W[gj];B[gk];W[hk];B[ik];W[fk];B[hj];W[gl];B[cc];W[dc]
;B[bd];W[be];B[bb];W[db];B[ac];W[cd];B[cb];W[ij];B[jk];W[hi];B[hh];W[fg];B[gg]
;W[ff];B[dh];W[bh];B[ch];W[bg];B[fh];W[nh];B[ni];W[ng];B[mi];W[ma];B[la];W[ja]
;B[na];W[ae];B[ad];W[oi];B[oj];W[oh];B[nk];W[mg];B[da];W[ea];B[ca];W[am];B[ak]
;W[bn];B[eg];W[ef];B[jj];W[ei];B[eh];W[gi];B[gh];W[oc];B[ob];W[od];B[bi];W[di]
;B[ej];W[fi];B[ii];W[ai];B[ci];W[lh];B[li];W[ho];B[io];W[go];B[bm];W[il];B[jl]
;W[hl];B[hj];W[fj];B[df];W[de];B[dg];W[lg];B[];W[]
;TR[fm][fl][ea][ma];AE[fm][fl][ea][ma]TB[jo:oo][jn:on][jm:km][mm:om][kl:ol][bk:ck][kk:lk][ok][ij][kj:nj][ji:ki][bc][ab][mb:nb][aa:ba][oa]TW[ao:fo][an][en][em][el][gk][ah][ag][og][af:bf][nf:of][ce][he:ke][me:oe][jd]
)
(copy paste into notepad, go to save as, select all files (instead of text) and save as filename.sgf to view file)
As you can see E15 is marked as dead. Black can atari at E14, but there is no sequence black can play to capture as white can extend to the right (and no nets work).
Obviously I'm not concerned about the score outcome, as I was playing as a guest, but this should probably be addressed for similar game situations in the future.