If there are two or more liquids in the recipe, and the machine, for example, has 10 output hatches in the template, with the possibility of replacing them with the casings of this machine. Then when you install two output hathes, instead of 10, the controller of the machine will read: there is nowhere to put the output liquid. Although there are 2 output hathes, there are also two liquids in the recipe. It seems to me that she is trying to unload liquids in 8 alternative hathes, which are replaced according to the pattern of the machine on the machine casings.

And is it possible to add to the syntax of the recipe so that a specific fluid comes out in a particular hatch? For example, in the syntax, specify the coordinates of the hatch and attach the output fluid from the recipe there.

You can already tag interfaces for preferring to use them for outputs.

Your first comment sounds like a syntax bug instead of a mod bug. The Discord server is a much better place for these type things than the github.