No, it is not misinformation. Although there is plenty of bad advice on Filipino FB groups, it is common to upload updated, financial documentation, even new affidavits of support when there are significant changes or a new tax year filing deadline has passed. However, the two documents you say she uploaded would not be necessary. Even so, what she did should not hurt anything either.
I'll just add that advice in these groups is given in the local language, which is very inefficient when discussing details. Terms tend to be vague, so it is easy to interpret too broadly. No harm here though, in my opinion.