distorting of score figures

i have a big concern regarding my scores on my profile. I have been following my score on day basis on my credit check which is affiliated with Compuscan. On their records under my score history, January 2019 -score 613 , February 2019-score 622 and March 2019- score 638 till to date current month of May 2019 on their score history tab. On my personal profiles i have requested from Compuscan shows different scores, of which i have records to prove that they distorting the figures of scores. 8 April 2019- score 638, 9 April 2019-score 643, 29 April 2019-score 643, 2 May 2019-score 638, 6 May 2019-score 647 and 9 May 2019-score 638. It surprises me because since beginning of January 2019 , i don't have overdue amount and arrears in my accounts .