Rec Guide buff & Myers on barracks

ok so i had a island recruitment buff running and a Myers on the barracks and the time stated for completion was 1 day 55 mins,
the Myers came to an end and suddenly the time for completion was 20 hours 46 mins,
then i placed an overtime buff on the barracks and the time to completion dropped down to 6 hours 54 mins

this is clearly a bug in the myers and rec guide working together then because this does not make sense - even when you take into consideration of the it calculating the time taken after the allocated barrack buff runs out, the total time should have been less with the myers and rec guide running than it was with just the rec guide running surely?

edit - sorry ive had it pointed out to me that this has been posted before - i did not see it but BB please sort it :D