I've added first week sales as an extra column.
I've also made a third list at the bottom which is the best selling single sorted by first week sales.
And updated with today's weekly sales.
So One Up!!! is actually Idoling!!!'s second best single in terms of first week sales, surpassing DTF by 105 copies. So that's actually not bad

(they're consistent as always

)
Hmm, the reason for Yarakai heart total sales to be lower is because I've only scraped the weekly sales. So if they fall out of the chart, I don't have data on that.
But there seems to be something strange about the monthly sales... (just what time period does oricon use for monthly sales?)
Yarakai heart:
1st week: 42691 (3/14)
2nd week: 2691 (3/21)
not charted 3/28 & 4/4 (this is 3/22-3/28 due to oricon's strange date system...)
weekly that totals 45382, that leaves 2397 for the rest of the month.
However those singles ranked in 50th position have 982 (3/28) and 1063 (4/4), which is only 2045 (it would be less for YH).
So if oricon's monthly ranking are on the actual 1st till last day of the month, that leaves (3/29-31) with at least 352 for YH.
Anyway, the totals on my page are from the weekly charted sales, so sales outside of the top 50 are not counted... I can try to put some manual corrections into my db to account for these differences.
Data outside of top 50 is very hard to find, and what I did find were just excerpts (like only 48-groups for example)...