MySQL stored procedure updates twice
If the table tMaster have the same pid inserted but is not in the table trendContentMaster it will update 20*(rows) depending how many times pid is inserted in tMaster table. This should work for you:

    DELIMITER $$
    CREATE PROCEDURE updateTrendContentStats(
    IN mongoid VARCHAR(255),
    IN numericid INT,
    IN points INT,
    IN ctype INT,
    IN activity INT,
    IN created INT)
     BEGIN
     DECLARE vCount INT(1) default 0;
     DECLARE vCount02 INT(1) default 0;

     SET vCount=(SELECT count(*) FROM trendContentMaster WHERE pid=numericid);
     SET vCount02=(SELECT count(*) FROM tMaster WHERE pid=numericid);

     IF (vCount = 0 &amp;&amp; vCount02 = 0) THEN
        INSERT INTO tMaster(tci,pid,tct,tcd,tcf,tcm,tcf,s) VALUES(mongoid,numericid,ctype,points,points,points,points,1);
     ELSE
        UPDATE tMaster 
        SET tcd = tcd + points,
            tcw = tcw + points,
            tcm = tcm + points,
            tcf = tcf + points WHERE pid=numericid;
     END IF;
     INSERT INTO tTransaction(tci,pid,tct,act,acp,cd) VALUES(mongoid,numericid,ctype,activity,points,created);
     END $$
    DELIMITER


PD: You should make a Foreing key in tMaster.pid.