Duplicate post titles in sitemap page

I do not know the reason but in sitemap page the titles of the post appear duplicates, like this:

Cayegory:

– Post 1
– Post 1

– Post 2
– Post 2

….

This is the shortcode I use … there is something wrong?

[wcs post=”post” exclude=”1181,1,4,5,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,27,26,57,18,1122,92,20,14,1116,16,1168,22,25,27,1111,1108,1105,1102,1099,1096,1093,1090,1087,1084,1081,1079,1076,1073,1070,1067,1064,1061,1058,1055,1052,1049,1046,1043,1040,1037,1034,1031,1028,1025,1022,1019,1016,1013,1010,1007,1004,1001,998,995,992,989,985,982,979,976,971,968,965,962,959,956,953,950,947,944,941,938,935,932,929,926,923,920,917,914,911,907,904,901,898,895,892,889,886,883,880,877,874,871,868,865,862,859,856,853,850,847,844,841,838,835,832,829,826,823,820,817,814,810,807,804,801,798,795,792,789,786,783,780,777,774,771,768,765,762,759,756,753,750,747,744,741,738,735,732,729,726,723,720,717,714,711,708,705,702,699,696,693,690,687,683,680,676,673,670,667,664,661,658,655,652,649,646,643,640,637,634,631,628,625,622,619,616,613,610,607,604,601,598,595,592,589,586,583,580,577,574,571,568,565,562,559,556,553,550,547,544,541,538,535,532,529,526,523,520,517,514,511,508,505,502,499,496,493,490,487,484,481,478,475,472,469,466,463,460,457,454,451,448,445,442,439,436,433,430,427,424,421,418,415,412,409,406,403,400,397,394,391,388,385,381,377,374,371,368,365,362,359,356,353,350,347,344,341,338,335,332,329,326,323,320,317,314,311,308,304,301,298,295,292,289,286,283,280,277,274,271,268,265,262,259,256,253,250,247,244,241,238,235,232,229,226,223,220,217,214,211,208,205,202,199,196,193,190,187,184,181,178,163,160,155,152,146,118,116,87,54″]

Regards

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