How to get total row count of table containing SDP Data ?

Summary: I want to display the total row count on the vbcs page. Using SDP.getTotalSize() i am displaying the count on the page. In the SDP totalResults count is different and the page displaying the row count is different.

Content (required): For Example: Table has total 70 records. It is loading with limit : 25, on scrolling more it is loading next 25 and so on. When i inspect and check in the Network tab there are three calls in which it loads data count =25, 25,20 and totalResults=70. But on the page the count is 60. and the number of records displayed are also 60. Not sure why it is showing less row count on the page.