Read the official program instructions and the executive order directly, rather than a summary. Note the date you read them and the specific figures they state for your route. Application materials themselves are filed with Form I-140G through the official portal once USCIS issues instructions, so the reading you do now is for planning, not submission.
Keep a dated record of what you verified
Save the page, the date, and the figures in one file, alongside any correspondence you receive. If an adviser quotes a different number later, the disagreement can be settled in a minute instead of an argument about memory. This also protects against material circulating from earlier announcements, which may look official without being current.
Re-check immediately before each payment, since a figure verified months earlier is a historical note. Save the page as it appeared rather than a link, since published material changes and a link retrieved later shows the current version rather than the one relied on. Record the date, the route, the figures and anything the material says about what is not included.
That file serves two purposes: it settles disagreements about numbers, and it shows the household what has actually changed between one check and the next, which is more informative than either figure alone. Re-check immediately before each payment rather than at a convenient moment beforehand.