Sorry but maybe I was so succint in my question. The only counter that this happens (to show diferents simbols betwen its sides) is CAN/16 so I think this could be an errata, but i don´t know if it´s a designer's choice or not. This is the reason of my doubt. I await replies. Thank you.
The target symbols are just a mechanism to give US units a 1/3 chance to be selected without dice. I would use the symbols as printed. The cannons are useless except for the 1 VP for being on the high ground and should be delayed until they can be landed near an Engineer base in which case they'll probably never become a targert or need to refer to their target symbol.
Sorry John but this is not true. I had a Situation where there is a decision whether to take the hit from a infantry unit or from Can/16. If the Symbol is different the infantry will be hit for sure otherwise I had a choice.