It does seem a little silly. Isn't an automatic thingy though?
Yes, but if the US announcement was that "we have to comply with the law which prohibits funding UN bodies which admit Palestine" rather than "we believe Palestine should negotiate with Israel to form a state instead of unilaterally going to the UN", then the context would have been different. The former could be a subtle sign the US is starting to soften its position. The latter shows nothing has changed. And the latter has been true.