Interesting. Customers can order cut oranges and orange juice in the future after you select the Orange Juice Upgrade. If this Upgrade is selected another teleporter should appear next to the lemon teleporter. This gives you oranges instead of lemons. If, however, customers are ordering recipes including oranges at the start of the game, and you do not have the required teleporter, you cannot give them the item they are asking for. This seems like a weird glitch if this is happening! Maybe refreshing the page can help resolve this issue?
Once again, sorry for the confusion.