Paid IV Scanner, user posting pokemon? Is that a scam? I've personally had scanners that are free and provide ivs if they are NOT shadowbanned.
Also no, ditto is only affected by partly cloudy weather and windy does not increase the chances of ledyba/yanma being ditto. Windy Weather Yanmas are likely still Yanmas. However, if it's partly cloudy weather, a ditto pretending as a Magikarp, Zubat, Ledyba or Yanma will NOT show the swirl below them, nor will they display to be affected by the weather in the capture screen.
And personally i found out you cannot avoid ditto, but you will know it when a trash pokemon begins to breakout from razz + greats or even razz + ultras and just stay there (They don't flee as often as the pokemon they copy), then you will giggle a bit when you see the "Oh?" sign appearing.