I have a RowList containing 32 rows. Each Row has an "itemComponentName" that contains a Poster component. For some of the rows, the first 4 items are displayed incorrectly, their position is translated to the right and towards the bottom of the screen. If I replace the poster with a Rectangle of let's say 100x100 pixels, all the items are correctly displayed, none of them is weirdly translated.
I printed the translation property for all the items and for those items that were incorrectly displayed, the translation was indeed different. I manually set the translation for all of my cases and now everything is properly displayed. Strange, somehow I think the translation that has to be done for the items in my "Search & Info" category was applied to those random rows also.
Do you have multiple SG children having the same id of "poster" and hence are getting incorrectly grabbed when you do the update of one particular child? When you first update your children with the content, try setting their id to something unique at the same time.