It could be you’re missing something on a visual scan. But also, I’ve seen ASCAP make adjustments to the numbers now and then, sometimes temporary. sometimes permanent. I’ve always found things a little flaky since they went to the new website.
One thing I’ve done now and then is painstakingly expand every one (the + sign) and copy/paste the whole thing into a document to have my own record of everything on a given date. But it’s a pain.