$600 for two worksheets is rough but the guy wasn't totally wrong about breaking tasks down. I've got 47 tabs of docs open for my own app and the only thing that got me moving was picking one tiny thing and doing it. Those "finish your project" programs are mostly selling you a feeling, not a fix. Slack messages don't build anything, closing them in batches does.

Maybe the bot did a better job than whoever approved it without reading.

Ever notice how when you stop white knuckling something it finally shows up? Same thing happens at the bar with tips, slow all night then everyone wants to buy a round at last call. Rejection emails pile up and you start thinking the whole thing is rigged, then boom, three in one week like the universe was just waiting for you to chill out. That portfolio tweak probably did help but honestly the bigger shift might be that you stopped sounding desperate in your cover letters without even knowing it. Three callbacks in a week is not normal luck, that is momentum, so ride it and prep hard for that tech screen.