I have not seen this before but i have heard this happen on some of the Bot Castles(ones with kadhfkjd (Gibberish) names) but again the next time they did the raid next week there was no such issue.

you might want to send a ticket to the support team to help check this. the link below might help you contact Support to raise a ticket.

http://support.plarium.com/enstormfall/Tickets/Submit/Step1/48

Hello Everyone,

Over the last week or so I have had an issue using my contacts for raids. I normally choose the closest castle that I have taken 0 rss from for the week as my standard routine and have found an issue. I will send a silent one to all the castles in the list and then select from the closest as well as the richest from the reports. 3 or 4 times recently I have collected 0 rss on the raid and when I go back and check the contact it will now show I have collect 50k for the week. I am sure the contact displayed 0 for the week prior to the raid or sending of the spy and no warning was given that the castle was maxed out.

I'm just curious if anyone else has seen this issue?